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Finding the Fourth Proportional to 86,728.66, 130,099.32 and 36,803.08

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Solution

The fourth proportional to 86,728.66, 130,099.32 and 36,803.08 is: 55,207.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,728.66 : 130,099.32 = 36,803.08 : x
  2. Step 2: Convert to fraction form
    86,728.66/130,099.32 = 36,803.08/x
  3. Step 3: Cross multiply
    86,728.66x = 130,099.32 × 36,803.08
  4. Step 4: Simplify right side
    86,728.66x = 4,788,055,681.91
  5. Step 5: Solve for x
    x = 4,788,055,681.91/86,728.66
  6. Step 6: Final answer
    x = 55,207.31

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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.