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Finding the Fourth Proportional to 101,728.68, 140,400.05 and 56,416.74

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Solution

The fourth proportional to 101,728.68, 140,400.05 and 56,416.74 is: 77,863.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,728.68 : 140,400.05 = 56,416.74 : x
  2. Step 2: Convert to fraction form
    101,728.68/140,400.05 = 56,416.74/x
  3. Step 3: Cross multiply
    101,728.68x = 140,400.05 × 56,416.74
  4. Step 4: Simplify right side
    101,728.68x = 7,920,912,834.75
  5. Step 5: Solve for x
    x = 7,920,912,834.75/101,728.68
  6. Step 6: Final answer
    x = 77,863.12

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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.