Home / 86,378.32-129,365.88-66,499.12

Finding the Fourth Proportional to 86,378.32, 129,365.88 and 66,499.12

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Solution

The fourth proportional to 86,378.32, 129,365.88 and 66,499.12 is: 99,593.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,378.32 : 129,365.88 = 66,499.12 : x
  2. Step 2: Convert to fraction form
    86,378.32/129,365.88 = 66,499.12/x
  3. Step 3: Cross multiply
    86,378.32x = 129,365.88 × 66,499.12
  4. Step 4: Simplify right side
    86,378.32x = 8,602,717,178.03
  5. Step 5: Solve for x
    x = 8,602,717,178.03/86,378.32
  6. Step 6: Final answer
    x = 99,593.48

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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.