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Finding the Fourth Proportional to 249,661.40, 374,512.72 and 81,177.90

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Solution

The fourth proportional to 249,661.40, 374,512.72 and 81,177.90 is: 121,773.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,661.40 : 374,512.72 = 81,177.90 : x
  2. Step 2: Convert to fraction form
    249,661.40/374,512.72 = 81,177.90/x
  3. Step 3: Cross multiply
    249,661.40x = 374,512.72 × 81,177.90
  4. Step 4: Simplify right side
    249,661.40x = 30,402,156,132.89
  5. Step 5: Solve for x
    x = 30,402,156,132.89/249,661.40
  6. Step 6: Final answer
    x = 121,773.55

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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.