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Finding the Fourth Proportional to 86,663.40, 130,038.30 and 49,252.20

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Solution

The fourth proportional to 86,663.40, 130,038.30 and 49,252.20 is: 73,902.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,663.40 : 130,038.30 = 49,252.20 : x
  2. Step 2: Convert to fraction form
    86,663.40/130,038.30 = 49,252.20/x
  3. Step 3: Cross multiply
    86,663.40x = 130,038.30 × 49,252.20
  4. Step 4: Simplify right side
    86,663.40x = 6,404,672,359.26
  5. Step 5: Solve for x
    x = 6,404,672,359.26/86,663.40
  6. Step 6: Final answer
    x = 73,902.85

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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.