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Finding the Fourth Proportional to 71,230.16, 106,805.76 and 29,139.76

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Solution

The fourth proportional to 71,230.16, 106,805.76 and 29,139.76 is: 43,693.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,230.16 : 106,805.76 = 29,139.76 : x
  2. Step 2: Convert to fraction form
    71,230.16/106,805.76 = 29,139.76/x
  3. Step 3: Cross multiply
    71,230.16x = 106,805.76 × 29,139.76
  4. Step 4: Simplify right side
    71,230.16x = 3,112,294,213.02
  5. Step 5: Solve for x
    x = 3,112,294,213.02/71,230.16
  6. Step 6: Final answer
    x = 43,693.49

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1.5x scale

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.