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Finding the Fourth Proportional to 52,465,130.60, 78,697,695.90 and 42,891,319.40

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Solution

The fourth proportional to 52,465,130.60, 78,697,695.90 and 42,891,319.40 is: 64,336,979.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,465,130.60 : 78,697,695.90 = 42,891,319.40 : x
  2. Step 2: Convert to fraction form
    52,465,130.60/78,697,695.90 = 42,891,319.40/x
  3. Step 3: Cross multiply
    52,465,130.60x = 78,697,695.90 × 42,891,319.40
  4. Step 4: Simplify right side
    52,465,130.60x = 3,375,448,010,890,970.50
  5. Step 5: Solve for x
    x = 3,375,448,010,890,970.50/52,465,130.60
  6. Step 6: Final answer
    x = 64,336,979.10

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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.