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Finding the Fourth Proportional to 249,387, 344,155.89 and 136,209.75

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Solution

The fourth proportional to 249,387, 344,155.89 and 136,209.75 is: 187,970.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,387 : 344,155.89 = 136,209.75 : x
  2. Step 2: Convert to fraction form
    249,387/344,155.89 = 136,209.75/x
  3. Step 3: Cross multiply
    249,387x = 344,155.89 × 136,209.75
  4. Step 4: Simplify right side
    249,387x = 46,877,387,737.93
  5. Step 5: Solve for x
    x = 46,877,387,737.93/249,387
  6. Step 6: Final answer
    x = 187,970.45

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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.