Home / 78,348,008.20-117,522,012.30-77,844,123.40

Finding the Fourth Proportional to 78,348,008.20, 117,522,012.30 and 77,844,123.40

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Solution

The fourth proportional to 78,348,008.20, 117,522,012.30 and 77,844,123.40 is: 116,766,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,348,008.20 : 117,522,012.30 = 77,844,123.40 : x
  2. Step 2: Convert to fraction form
    78,348,008.20/117,522,012.30 = 77,844,123.40/x
  3. Step 3: Cross multiply
    78,348,008.20x = 117,522,012.30 × 77,844,123.40
  4. Step 4: Simplify right side
    78,348,008.20x = 9,148,398,027,697,518
  5. Step 5: Solve for x
    x = 9,148,398,027,697,518/78,348,008.20
  6. Step 6: Final answer
    x = 116,766,185.10

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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.