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Finding the Fourth Proportional to 136,752.42, 188,492.47 and 91,413.87

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Solution

The fourth proportional to 136,752.42, 188,492.47 and 91,413.87 is: 126,000.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,752.42 : 188,492.47 = 91,413.87 : x
  2. Step 2: Convert to fraction form
    136,752.42/188,492.47 = 91,413.87/x
  3. Step 3: Cross multiply
    136,752.42x = 188,492.47 × 91,413.87
  4. Step 4: Simplify right side
    136,752.42x = 17,230,825,213.18
  5. Step 5: Solve for x
    x = 17,230,825,213.18/136,752.42
  6. Step 6: Final answer
    x = 126,000.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.