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Finding the Fourth Proportional to 72,740.58, 100,366.95 and 42,520.05

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Solution

The fourth proportional to 72,740.58, 100,366.95 and 42,520.05 is: 58,668.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,740.58 : 100,366.95 = 42,520.05 : x
  2. Step 2: Convert to fraction form
    72,740.58/100,366.95 = 42,520.05/x
  3. Step 3: Cross multiply
    72,740.58x = 100,366.95 × 42,520.05
  4. Step 4: Simplify right side
    72,740.58x = 4,267,607,732.35
  5. Step 5: Solve for x
    x = 4,267,607,732.35/72,740.58
  6. Step 6: Final answer
    x = 58,668.87

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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.