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Finding the Fourth Proportional to 249,831.60, 374,617.80 and 91,978.80

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Solution

The fourth proportional to 249,831.60, 374,617.80 and 91,978.80 is: 137,920.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,831.60 : 374,617.80 = 91,978.80 : x
  2. Step 2: Convert to fraction form
    249,831.60/374,617.80 = 91,978.80/x
  3. Step 3: Cross multiply
    249,831.60x = 374,617.80 × 91,978.80
  4. Step 4: Simplify right side
    249,831.60x = 34,456,895,702.64
  5. Step 5: Solve for x
    x = 34,456,895,702.64/249,831.60
  6. Step 6: Final answer
    x = 137,920.49

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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.