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Finding the Fourth Proportional to 96,116.80, 144,002.40 and 78,491.20

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Solution

The fourth proportional to 96,116.80, 144,002.40 and 78,491.20 is: 117,595.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,116.80 : 144,002.40 = 78,491.20 : x
  2. Step 2: Convert to fraction form
    96,116.80/144,002.40 = 78,491.20/x
  3. Step 3: Cross multiply
    96,116.80x = 144,002.40 × 78,491.20
  4. Step 4: Simplify right side
    96,116.80x = 11,302,921,178.88
  5. Step 5: Solve for x
    x = 11,302,921,178.88/96,116.80
  6. Step 6: Final answer
    x = 117,595.69

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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.