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Finding the Fourth Proportional to 314,928,461.20, 472,392,691.80 and 84,920,796.40

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Solution

The fourth proportional to 314,928,461.20, 472,392,691.80 and 84,920,796.40 is: 127,381,194.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,928,461.20 : 472,392,691.80 = 84,920,796.40 : x
  2. Step 2: Convert to fraction form
    314,928,461.20/472,392,691.80 = 84,920,796.40/x
  3. Step 3: Cross multiply
    314,928,461.20x = 472,392,691.80 × 84,920,796.40
  4. Step 4: Simplify right side
    314,928,461.20x = 40,115,963,601,195,752
  5. Step 5: Solve for x
    x = 40,115,963,601,195,752/314,928,461.20
  6. Step 6: Final answer
    x = 127,381,194.60

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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.