Home / 261,421.30-392,391.15-128,451.70

Finding the Fourth Proportional to 261,421.30, 392,391.15 and 128,451.70

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Solution

The fourth proportional to 261,421.30, 392,391.15 and 128,451.70 is: 192,804.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,421.30 : 392,391.15 = 128,451.70 : x
  2. Step 2: Convert to fraction form
    261,421.30/392,391.15 = 128,451.70/x
  3. Step 3: Cross multiply
    261,421.30x = 392,391.15 × 128,451.70
  4. Step 4: Simplify right side
    261,421.30x = 50,403,310,282.46
  5. Step 5: Solve for x
    x = 50,403,310,282.46/261,421.30
  6. Step 6: Final answer
    x = 192,804.91

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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.