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Finding the Fourth Proportional to 425,787,920.64, 638,789,754.64 and 130,698,001.20

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Solution

The fourth proportional to 425,787,920.64, 638,789,754.64 and 130,698,001.20 is: 196,080,114.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,787,920.64 : 638,789,754.64 = 130,698,001.20 : x
  2. Step 2: Convert to fraction form
    425,787,920.64/638,789,754.64 = 130,698,001.20/x
  3. Step 3: Cross multiply
    425,787,920.64x = 638,789,754.64 × 130,698,001.20
  4. Step 4: Simplify right side
    425,787,920.64x = 83,488,544,118,486,432
  5. Step 5: Solve for x
    x = 83,488,544,118,486,432/425,787,920.64
  6. Step 6: Final answer
    x = 196,080,114.23

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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.