Home / 78,834.20-118,251.30-77,538.20

Finding the Fourth Proportional to 78,834.20, 118,251.30 and 77,538.20

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Solution

The fourth proportional to 78,834.20, 118,251.30 and 77,538.20 is: 116,307.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,834.20 : 118,251.30 = 77,538.20 : x
  2. Step 2: Convert to fraction form
    78,834.20/118,251.30 = 77,538.20/x
  3. Step 3: Cross multiply
    78,834.20x = 118,251.30 × 77,538.20
  4. Step 4: Simplify right side
    78,834.20x = 9,168,992,949.66
  5. Step 5: Solve for x
    x = 9,168,992,949.66/78,834.20
  6. Step 6: Final answer
    x = 116,307.30

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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.