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Finding the Fourth Proportional to 249,065.78, 343,711.89 and 135,890.90

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Solution

The fourth proportional to 249,065.78, 343,711.89 and 135,890.90 is: 187,530.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,065.78 : 343,711.89 = 135,890.90 : x
  2. Step 2: Convert to fraction form
    249,065.78/343,711.89 = 135,890.90/x
  3. Step 3: Cross multiply
    249,065.78x = 343,711.89 × 135,890.90
  4. Step 4: Simplify right side
    249,065.78x = 46,707,318,072.80
  5. Step 5: Solve for x
    x = 46,707,318,072.80/249,065.78
  6. Step 6: Final answer
    x = 187,530.05

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1.5x scale

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.