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Finding the Fourth Proportional to 425,139.11, 637,798.61 and 140,813.55

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Solution

The fourth proportional to 425,139.11, 637,798.61 and 140,813.55 is: 211,250.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,139.11 : 637,798.61 = 140,813.55 : x
  2. Step 2: Convert to fraction form
    425,139.11/637,798.61 = 140,813.55/x
  3. Step 3: Cross multiply
    425,139.11x = 637,798.61 × 140,813.55
  4. Step 4: Simplify right side
    425,139.11x = 89,810,686,459.17
  5. Step 5: Solve for x
    x = 89,810,686,459.17/425,139.11
  6. Step 6: Final answer
    x = 211,250.12

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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.