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Finding the Fourth Proportional to 81,648,011.60, 122,472,017.40 and 30,523,387.40

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Solution

The fourth proportional to 81,648,011.60, 122,472,017.40 and 30,523,387.40 is: 45,785,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,648,011.60 : 122,472,017.40 = 30,523,387.40 : x
  2. Step 2: Convert to fraction form
    81,648,011.60/122,472,017.40 = 30,523,387.40/x
  3. Step 3: Cross multiply
    81,648,011.60x = 122,472,017.40 × 30,523,387.40
  4. Step 4: Simplify right side
    81,648,011.60x = 3,738,260,832,759,741
  5. Step 5: Solve for x
    x = 3,738,260,832,759,741/81,648,011.60
  6. Step 6: Final answer
    x = 45,785,081.10

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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.