Home / 153,929.13-212,422.20-86,861.13

Finding the Fourth Proportional to 153,929.13, 212,422.20 and 86,861.13

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Solution

The fourth proportional to 153,929.13, 212,422.20 and 86,861.13 is: 119,868.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,929.13 : 212,422.20 = 86,861.13 : x
  2. Step 2: Convert to fraction form
    153,929.13/212,422.20 = 86,861.13/x
  3. Step 3: Cross multiply
    153,929.13x = 212,422.20 × 86,861.13
  4. Step 4: Simplify right side
    153,929.13x = 18,451,232,329.09
  5. Step 5: Solve for x
    x = 18,451,232,329.09/153,929.13
  6. Step 6: Final answer
    x = 119,868.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.