Home / 86,135.81-129,213.43-39,376.13

Finding the Fourth Proportional to 86,135.81, 129,213.43 and 39,376.13

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Solution

The fourth proportional to 86,135.81, 129,213.43 and 39,376.13 is: 59,068.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,135.81 : 129,213.43 = 39,376.13 : x
  2. Step 2: Convert to fraction form
    86,135.81/129,213.43 = 39,376.13/x
  3. Step 3: Cross multiply
    86,135.81x = 129,213.43 × 39,376.13
  4. Step 4: Simplify right side
    86,135.81x = 5,087,924,072.92
  5. Step 5: Solve for x
    x = 5,087,924,072.92/86,135.81
  6. Step 6: Final answer
    x = 59,068.63

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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.