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Finding the Fourth Proportional to 86,839.30, 130,064.55 and 84,895.30

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Solution

The fourth proportional to 86,839.30, 130,064.55 and 84,895.30 is: 127,152.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,839.30 : 130,064.55 = 84,895.30 : x
  2. Step 2: Convert to fraction form
    86,839.30/130,064.55 = 84,895.30/x
  3. Step 3: Cross multiply
    86,839.30x = 130,064.55 × 84,895.30
  4. Step 4: Simplify right side
    86,839.30x = 11,041,868,991.62
  5. Step 5: Solve for x
    x = 11,041,868,991.62/86,839.30
  6. Step 6: Final answer
    x = 127,152.90

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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.