Home / 138,171.15-207,088.65-78,050.52

Finding the Fourth Proportional to 138,171.15, 207,088.65 and 78,050.52

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Solution

The fourth proportional to 138,171.15, 207,088.65 and 78,050.52 is: 116,980.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,171.15 : 207,088.65 = 78,050.52 : x
  2. Step 2: Convert to fraction form
    138,171.15/207,088.65 = 78,050.52/x
  3. Step 3: Cross multiply
    138,171.15x = 207,088.65 × 78,050.52
  4. Step 4: Simplify right side
    138,171.15x = 16,163,376,818.60
  5. Step 5: Solve for x
    x = 16,163,376,818.60/138,171.15
  6. Step 6: Final answer
    x = 116,980.84

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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.