Home / 261,036.40-391,554.60-128,176.15

Finding the Fourth Proportional to 261,036.40, 391,554.60 and 128,176.15

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Solution

The fourth proportional to 261,036.40, 391,554.60 and 128,176.15 is: 192,264.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,036.40 : 391,554.60 = 128,176.15 : x
  2. Step 2: Convert to fraction form
    261,036.40/391,554.60 = 128,176.15/x
  3. Step 3: Cross multiply
    261,036.40x = 391,554.60 × 128,176.15
  4. Step 4: Simplify right side
    261,036.40x = 50,187,961,142.79
  5. Step 5: Solve for x
    x = 50,187,961,142.79/261,036.40
  6. Step 6: Final answer
    x = 192,264.23

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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.