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Finding the Fourth Proportional to 261,657.27, 392,236.68 and 84,039.69

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Solution

The fourth proportional to 261,657.27, 392,236.68 and 84,039.69 is: 125,979.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,657.27 : 392,236.68 = 84,039.69 : x
  2. Step 2: Convert to fraction form
    261,657.27/392,236.68 = 84,039.69/x
  3. Step 3: Cross multiply
    261,657.27x = 392,236.68 × 84,039.69
  4. Step 4: Simplify right side
    261,657.27x = 32,963,448,993.83
  5. Step 5: Solve for x
    x = 32,963,448,993.83/261,657.27
  6. Step 6: Final answer
    x = 125,979.49

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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.