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Finding the Fourth Proportional to 66,872,458.60, 100,308,687.90 and 48,638,127.40

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Solution

The fourth proportional to 66,872,458.60, 100,308,687.90 and 48,638,127.40 is: 72,957,191.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,872,458.60 : 100,308,687.90 = 48,638,127.40 : x
  2. Step 2: Convert to fraction form
    66,872,458.60/100,308,687.90 = 48,638,127.40/x
  3. Step 3: Cross multiply
    66,872,458.60x = 100,308,687.90 × 48,638,127.40
  4. Step 4: Simplify right side
    66,872,458.60x = 4,878,826,741,407,039
  5. Step 5: Solve for x
    x = 4,878,826,741,407,039/66,872,458.60
  6. Step 6: Final answer
    x = 72,957,191.10

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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.