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Finding the Fourth Proportional to 363,791,438.40, 545,691,823.20 and 121,454,342.40

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Solution

The fourth proportional to 363,791,438.40, 545,691,823.20 and 121,454,342.40 is: 182,183,071.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,791,438.40 : 545,691,823.20 = 121,454,342.40 : x
  2. Step 2: Convert to fraction form
    363,791,438.40/545,691,823.20 = 121,454,342.40/x
  3. Step 3: Cross multiply
    363,791,438.40x = 545,691,823.20 × 121,454,342.40
  4. Step 4: Simplify right side
    363,791,438.40x = 66,276,641,539,813,072
  5. Step 5: Solve for x
    x = 66,276,641,539,813,072/363,791,438.40
  6. Step 6: Final answer
    x = 182,183,071.24

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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.