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Finding the Fourth Proportional to 86,689.16, 130,051.92 and 49,266.56

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Solution

The fourth proportional to 86,689.16, 130,051.92 and 49,266.56 is: 73,910.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,689.16 : 130,051.92 = 49,266.56 : x
  2. Step 2: Convert to fraction form
    86,689.16/130,051.92 = 49,266.56/x
  3. Step 3: Cross multiply
    86,689.16x = 130,051.92 × 49,266.56
  4. Step 4: Simplify right side
    86,689.16x = 6,407,210,719.80
  5. Step 5: Solve for x
    x = 6,407,210,719.80/86,689.16
  6. Step 6: Final answer
    x = 73,910.17

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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.