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Finding the Fourth Proportional to 180,951.60, 249,721.40 and 100,379.18

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Solution

The fourth proportional to 180,951.60, 249,721.40 and 100,379.18 is: 138,527.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,951.60 : 249,721.40 = 100,379.18 : x
  2. Step 2: Convert to fraction form
    180,951.60/249,721.40 = 100,379.18/x
  3. Step 3: Cross multiply
    180,951.60x = 249,721.40 × 100,379.18
  4. Step 4: Simplify right side
    180,951.60x = 25,066,827,609.95
  5. Step 5: Solve for x
    x = 25,066,827,609.95/180,951.60
  6. Step 6: Final answer
    x = 138,527.80

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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.