Home / 86,539.40-129,809.10-53,151.20

Finding the Fourth Proportional to 86,539.40, 129,809.10 and 53,151.20

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Solution

The fourth proportional to 86,539.40, 129,809.10 and 53,151.20 is: 79,726.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,539.40 : 129,809.10 = 53,151.20 : x
  2. Step 2: Convert to fraction form
    86,539.40/129,809.10 = 53,151.20/x
  3. Step 3: Cross multiply
    86,539.40x = 129,809.10 × 53,151.20
  4. Step 4: Simplify right side
    86,539.40x = 6,899,509,435.92
  5. Step 5: Solve for x
    x = 6,899,509,435.92/86,539.40
  6. Step 6: Final answer
    x = 79,726.80

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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.