Home / 138,245,005.40-207,367,508.10-86,960,730.20

Finding the Fourth Proportional to 138,245,005.40, 207,367,508.10 and 86,960,730.20

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Solution

The fourth proportional to 138,245,005.40, 207,367,508.10 and 86,960,730.20 is: 130,441,095.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,245,005.40 : 207,367,508.10 = 86,960,730.20 : x
  2. Step 2: Convert to fraction form
    138,245,005.40/207,367,508.10 = 86,960,730.20/x
  3. Step 3: Cross multiply
    138,245,005.40x = 207,367,508.10 × 86,960,730.20
  4. Step 4: Simplify right side
    138,245,005.40x = 18,032,829,924,130,416
  5. Step 5: Solve for x
    x = 18,032,829,924,130,416/138,245,005.40
  6. Step 6: Final answer
    x = 130,441,095.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.