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Finding the Fourth Proportional to 72,156.53, 99,511.54 and 45,301.55

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Solution

The fourth proportional to 72,156.53, 99,511.54 and 45,301.55 is: 62,475.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,156.53 : 99,511.54 = 45,301.55 : x
  2. Step 2: Convert to fraction form
    72,156.53/99,511.54 = 45,301.55/x
  3. Step 3: Cross multiply
    72,156.53x = 99,511.54 × 45,301.55
  4. Step 4: Simplify right side
    72,156.53x = 4,508,026,394.08
  5. Step 5: Solve for x
    x = 4,508,026,394.08/72,156.53
  6. Step 6: Final answer
    x = 62,475.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.