Home / 85,890,459.90-128,835,689.85-76,484,610.30

Finding the Fourth Proportional to 85,890,459.90, 128,835,689.85 and 76,484,610.30

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Solution

The fourth proportional to 85,890,459.90, 128,835,689.85 and 76,484,610.30 is: 114,726,915.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890,459.90 : 128,835,689.85 = 76,484,610.30 : x
  2. Step 2: Convert to fraction form
    85,890,459.90/128,835,689.85 = 76,484,610.30/x
  3. Step 3: Cross multiply
    85,890,459.90x = 128,835,689.85 × 76,484,610.30
  4. Step 4: Simplify right side
    85,890,459.90x = 9,853,947,530,908,914
  5. Step 5: Solve for x
    x = 9,853,947,530,908,914/85,890,459.90
  6. Step 6: Final answer
    x = 114,726,915.45

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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.