Home / 42,207.30-63,278.12-21,136.52

Finding the Fourth Proportional to 42,207.30, 63,278.12 and 21,136.52

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Solution

The fourth proportional to 42,207.30, 63,278.12 and 21,136.52 is: 31,688.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,207.30 : 63,278.12 = 21,136.52 : x
  2. Step 2: Convert to fraction form
    42,207.30/63,278.12 = 21,136.52/x
  3. Step 3: Cross multiply
    42,207.30x = 63,278.12 × 21,136.52
  4. Step 4: Simplify right side
    42,207.30x = 1,337,478,826.87
  5. Step 5: Solve for x
    x = 1,337,478,826.87/42,207.30
  6. Step 6: Final answer
    x = 31,688.33

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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.