Home / 261,990.05-392,946.80-128,834.55

Finding the Fourth Proportional to 261,990.05, 392,946.80 and 128,834.55

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Solution

The fourth proportional to 261,990.05, 392,946.80 and 128,834.55 is: 193,233.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,990.05 : 392,946.80 = 128,834.55 : x
  2. Step 2: Convert to fraction form
    261,990.05/392,946.80 = 128,834.55/x
  3. Step 3: Cross multiply
    261,990.05x = 392,946.80 × 128,834.55
  4. Step 4: Simplify right side
    261,990.05x = 50,625,123,507.77
  5. Step 5: Solve for x
    x = 50,625,123,507.77/261,990.05
  6. Step 6: Final answer
    x = 193,233.00

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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.