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Finding the Fourth Proportional to 71,721.20, 107,630.40 and 46,700.30

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Solution

The fourth proportional to 71,721.20, 107,630.40 and 46,700.30 is: 70,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,721.20 : 107,630.40 = 46,700.30 : x
  2. Step 2: Convert to fraction form
    71,721.20/107,630.40 = 46,700.30/x
  3. Step 3: Cross multiply
    71,721.20x = 107,630.40 × 46,700.30
  4. Step 4: Simplify right side
    71,721.20x = 5,026,371,969.12
  5. Step 5: Solve for x
    x = 5,026,371,969.12/71,721.20
  6. Step 6: Final answer
    x = 70,082.10

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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.