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Finding the Fourth Proportional to 72,771.50, 100,387.92 and 42,537.07

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Solution

The fourth proportional to 72,771.50, 100,387.92 and 42,537.07 is: 58,679.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,771.50 : 100,387.92 = 42,537.07 : x
  2. Step 2: Convert to fraction form
    72,771.50/100,387.92 = 42,537.07/x
  3. Step 3: Cross multiply
    72,771.50x = 100,387.92 × 42,537.07
  4. Step 4: Simplify right side
    72,771.50x = 4,270,207,980.19
  5. Step 5: Solve for x
    x = 4,270,207,980.19/72,771.50
  6. Step 6: Final answer
    x = 58,679.68

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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.