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Finding the Fourth Proportional to 78,374.80, 117,562.20 and 77,937.40

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Solution

The fourth proportional to 78,374.80, 117,562.20 and 77,937.40 is: 116,906.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,374.80 : 117,562.20 = 77,937.40 : x
  2. Step 2: Convert to fraction form
    78,374.80/117,562.20 = 77,937.40/x
  3. Step 3: Cross multiply
    78,374.80x = 117,562.20 × 77,937.40
  4. Step 4: Simplify right side
    78,374.80x = 9,162,492,206.28
  5. Step 5: Solve for x
    x = 9,162,492,206.28/78,374.80
  6. Step 6: Final answer
    x = 116,906.10

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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.