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Finding the Fourth Proportional to 121,292.60, 181,938.90 and 103,577.90

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Solution

The fourth proportional to 121,292.60, 181,938.90 and 103,577.90 is: 155,366.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,292.60 : 181,938.90 = 103,577.90 : x
  2. Step 2: Convert to fraction form
    121,292.60/181,938.90 = 103,577.90/x
  3. Step 3: Cross multiply
    121,292.60x = 181,938.90 × 103,577.90
  4. Step 4: Simplify right side
    121,292.60x = 18,844,849,190.31
  5. Step 5: Solve for x
    x = 18,844,849,190.31/121,292.60
  6. Step 6: Final answer
    x = 155,366.85

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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.