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Finding the Fourth Proportional to 99,794,541.60, 149,691,812.40 and 72,920,685.60

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Solution

The fourth proportional to 99,794,541.60, 149,691,812.40 and 72,920,685.60 is: 109,381,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,794,541.60 : 149,691,812.40 = 72,920,685.60 : x
  2. Step 2: Convert to fraction form
    99,794,541.60/149,691,812.40 = 72,920,685.60/x
  3. Step 3: Cross multiply
    99,794,541.60x = 149,691,812.40 × 72,920,685.60
  4. Step 4: Simplify right side
    99,794,541.60x = 10,915,629,588,914,580
  5. Step 5: Solve for x
    x = 10,915,629,588,914,580/99,794,541.60
  6. Step 6: Final answer
    x = 109,381,028.40

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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.