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Finding the Fourth Proportional to 249,089.92, 343,772.88 and 138,719.68

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Solution

The fourth proportional to 249,089.92, 343,772.88 and 138,719.68 is: 191,449.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,089.92 : 343,772.88 = 138,719.68 : x
  2. Step 2: Convert to fraction form
    249,089.92/343,772.88 = 138,719.68/x
  3. Step 3: Cross multiply
    249,089.92x = 343,772.88 × 138,719.68
  4. Step 4: Simplify right side
    249,089.92x = 47,688,063,906.28
  5. Step 5: Solve for x
    x = 47,688,063,906.28/249,089.92
  6. Step 6: Final answer
    x = 191,449.19

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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.