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Finding the Fourth Proportional to 103,615.88, 142,990.14 and 61,177.16

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Solution

The fourth proportional to 103,615.88, 142,990.14 and 61,177.16 is: 84,424.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,615.88 : 142,990.14 = 61,177.16 : x
  2. Step 2: Convert to fraction form
    103,615.88/142,990.14 = 61,177.16/x
  3. Step 3: Cross multiply
    103,615.88x = 142,990.14 × 61,177.16
  4. Step 4: Simplify right side
    103,615.88x = 8,747,730,673.20
  5. Step 5: Solve for x
    x = 8,747,730,673.20/103,615.88
  6. Step 6: Final answer
    x = 84,424.61

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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.