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Finding the Fourth Proportional to 60,403.52, 90,615.11 and 20,426.38

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Solution

The fourth proportional to 60,403.52, 90,615.11 and 20,426.38 is: 30,642.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,403.52 : 90,615.11 = 20,426.38 : x
  2. Step 2: Convert to fraction form
    60,403.52/90,615.11 = 20,426.38/x
  3. Step 3: Cross multiply
    60,403.52x = 90,615.11 × 20,426.38
  4. Step 4: Simplify right side
    60,403.52x = 1,850,938,341.93
  5. Step 5: Solve for x
    x = 1,850,938,341.93/60,403.52
  6. Step 6: Final answer
    x = 30,642.89

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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.