Home / 261,036.65-391,554.98-128,176.40

Finding the Fourth Proportional to 261,036.65, 391,554.98 and 128,176.40

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Solution

The fourth proportional to 261,036.65, 391,554.98 and 128,176.40 is: 192,264.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,036.65 : 391,554.98 = 128,176.40 : x
  2. Step 2: Convert to fraction form
    261,036.65/391,554.98 = 128,176.40/x
  3. Step 3: Cross multiply
    261,036.65x = 391,554.98 × 128,176.40
  4. Step 4: Simplify right side
    261,036.65x = 50,188,107,097.59
  5. Step 5: Solve for x
    x = 50,188,107,097.59/261,036.65
  6. Step 6: Final answer
    x = 192,264.60

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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.