Home / 85,884,657.30-128,743,005.15-76,814,730.90

Finding the Fourth Proportional to 85,884,657.30, 128,743,005.15 and 76,814,730.90

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Solution

The fourth proportional to 85,884,657.30, 128,743,005.15 and 76,814,730.90 is: 115,146,984.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,884,657.30 : 128,743,005.15 = 76,814,730.90 : x
  2. Step 2: Convert to fraction form
    85,884,657.30/128,743,005.15 = 76,814,730.90/x
  3. Step 3: Cross multiply
    85,884,657.30x = 128,743,005.15 × 76,814,730.90
  4. Step 4: Simplify right side
    85,884,657.30x = 9,889,359,295,854,566
  5. Step 5: Solve for x
    x = 9,889,359,295,854,566/85,884,657.30
  6. Step 6: Final answer
    x = 115,146,984.42

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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.