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Finding the Fourth Proportional to 249,125, 373,708.56 and 78,385.88

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Solution

The fourth proportional to 249,125, 373,708.56 and 78,385.88 is: 117,585.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,125 : 373,708.56 = 78,385.88 : x
  2. Step 2: Convert to fraction form
    249,125/373,708.56 = 78,385.88/x
  3. Step 3: Cross multiply
    249,125x = 373,708.56 × 78,385.88
  4. Step 4: Simplify right side
    249,125x = 29,293,474,339.13
  5. Step 5: Solve for x
    x = 29,293,474,339.13/249,125
  6. Step 6: Final answer
    x = 117,585.45

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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.