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Finding the Fourth Proportional to 52,465,129.60, 78,697,694.40 and 42,891,318.40

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Solution

The fourth proportional to 52,465,129.60, 78,697,694.40 and 42,891,318.40 is: 64,336,977.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,465,129.60 : 78,697,694.40 = 42,891,318.40 : x
  2. Step 2: Convert to fraction form
    52,465,129.60/78,697,694.40 = 42,891,318.40/x
  3. Step 3: Cross multiply
    52,465,129.60x = 78,697,694.40 × 42,891,318.40
  4. Step 4: Simplify right side
    52,465,129.60x = 3,375,447,867,856,297
  5. Step 5: Solve for x
    x = 3,375,447,867,856,297/52,465,129.60
  6. Step 6: Final answer
    x = 64,336,977.60

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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.