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Finding the Fourth Proportional to 91,992,705.80, 137,989,058.70 and 69,034,454.60

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Solution

The fourth proportional to 91,992,705.80, 137,989,058.70 and 69,034,454.60 is: 103,551,681.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,992,705.80 : 137,989,058.70 = 69,034,454.60 : x
  2. Step 2: Convert to fraction form
    91,992,705.80/137,989,058.70 = 69,034,454.60/x
  3. Step 3: Cross multiply
    91,992,705.80x = 137,989,058.70 × 69,034,454.60
  4. Step 4: Simplify right side
    91,992,705.80x = 9,525,999,408,121,884
  5. Step 5: Solve for x
    x = 9,525,999,408,121,884/91,992,705.80
  6. Step 6: Final answer
    x = 103,551,681.90

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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.