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Finding the Fourth Proportional to 72,646.93, 100,248.15 and 42,440.80

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Solution

The fourth proportional to 72,646.93, 100,248.15 and 42,440.80 is: 58,565.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,646.93 : 100,248.15 = 42,440.80 : x
  2. Step 2: Convert to fraction form
    72,646.93/100,248.15 = 42,440.80/x
  3. Step 3: Cross multiply
    72,646.93x = 100,248.15 × 42,440.80
  4. Step 4: Simplify right side
    72,646.93x = 4,254,611,684.52
  5. Step 5: Solve for x
    x = 4,254,611,684.52/72,646.93
  6. Step 6: Final answer
    x = 58,565.61

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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.