Home / 78,168,052.20-117,252,078.30-66,578,701.80

Finding the Fourth Proportional to 78,168,052.20, 117,252,078.30 and 66,578,701.80

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Solution

The fourth proportional to 78,168,052.20, 117,252,078.30 and 66,578,701.80 is: 99,868,052.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,168,052.20 : 117,252,078.30 = 66,578,701.80 : x
  2. Step 2: Convert to fraction form
    78,168,052.20/117,252,078.30 = 66,578,701.80/x
  3. Step 3: Cross multiply
    78,168,052.20x = 117,252,078.30 × 66,578,701.80
  4. Step 4: Simplify right side
    78,168,052.20x = 7,806,491,156,565,950
  5. Step 5: Solve for x
    x = 7,806,491,156,565,950/78,168,052.20
  6. Step 6: Final answer
    x = 99,868,052.70

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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.