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Finding the Fourth Proportional to 172,340.40, 257,148.78 and 149,012.40

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Solution

The fourth proportional to 172,340.40, 257,148.78 and 149,012.40 is: 222,341.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,340.40 : 257,148.78 = 149,012.40 : x
  2. Step 2: Convert to fraction form
    172,340.40/257,148.78 = 149,012.40/x
  3. Step 3: Cross multiply
    172,340.40x = 257,148.78 × 149,012.40
  4. Step 4: Simplify right side
    172,340.40x = 38,318,356,864.87
  5. Step 5: Solve for x
    x = 38,318,356,864.87/172,340.40
  6. Step 6: Final answer
    x = 222,341.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.