Home / 78,743.60-118,127.30-25,417.76

Finding the Fourth Proportional to 78,743.60, 118,127.30 and 25,417.76

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Solution

The fourth proportional to 78,743.60, 118,127.30 and 25,417.76 is: 38,130.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,743.60 : 118,127.30 = 25,417.76 : x
  2. Step 2: Convert to fraction form
    78,743.60/118,127.30 = 25,417.76/x
  3. Step 3: Cross multiply
    78,743.60x = 118,127.30 × 25,417.76
  4. Step 4: Simplify right side
    78,743.60x = 3,002,531,360.85
  5. Step 5: Solve for x
    x = 3,002,531,360.85/78,743.60
  6. Step 6: Final answer
    x = 38,130.48

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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.