Home / 261,165.09-391,804.01-81,247.05

Finding the Fourth Proportional to 261,165.09, 391,804.01 and 81,247.05

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Solution

The fourth proportional to 261,165.09, 391,804.01 and 81,247.05 is: 121,888.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,165.09 : 391,804.01 = 81,247.05 : x
  2. Step 2: Convert to fraction form
    261,165.09/391,804.01 = 81,247.05/x
  3. Step 3: Cross multiply
    261,165.09x = 391,804.01 × 81,247.05
  4. Step 4: Simplify right side
    261,165.09x = 31,832,920,117.62
  5. Step 5: Solve for x
    x = 31,832,920,117.62/261,165.09
  6. Step 6: Final answer
    x = 121,888.12

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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.