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Finding the Fourth Proportional to 249,742.70, 374,614.05 and 81,278.90

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Solution

The fourth proportional to 249,742.70, 374,614.05 and 81,278.90 is: 121,918.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,742.70 : 374,614.05 = 81,278.90 : x
  2. Step 2: Convert to fraction form
    249,742.70/374,614.05 = 81,278.90/x
  3. Step 3: Cross multiply
    249,742.70x = 374,614.05 × 81,278.90
  4. Step 4: Simplify right side
    249,742.70x = 30,448,217,908.55
  5. Step 5: Solve for x
    x = 30,448,217,908.55/249,742.70
  6. Step 6: Final answer
    x = 121,918.35

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1.5x scale

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.