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Finding the Fourth Proportional to 91,774.60, 137,661.90 and 88,275.40

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Solution

The fourth proportional to 91,774.60, 137,661.90 and 88,275.40 is: 132,413.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,774.60 : 137,661.90 = 88,275.40 : x
  2. Step 2: Convert to fraction form
    91,774.60/137,661.90 = 88,275.40/x
  3. Step 3: Cross multiply
    91,774.60x = 137,661.90 × 88,275.40
  4. Step 4: Simplify right side
    91,774.60x = 12,152,159,287.26
  5. Step 5: Solve for x
    x = 12,152,159,287.26/91,774.60
  6. Step 6: Final answer
    x = 132,413.10

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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.