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Finding the Fourth Proportional to 159,988.51, 240,114 and 81,125.29

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Solution

The fourth proportional to 159,988.51, 240,114 and 81,125.29 is: 121,754.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,988.51 : 240,114 = 81,125.29 : x
  2. Step 2: Convert to fraction form
    159,988.51/240,114 = 81,125.29/x
  3. Step 3: Cross multiply
    159,988.51x = 240,114 × 81,125.29
  4. Step 4: Simplify right side
    159,988.51x = 19,479,317,883.06
  5. Step 5: Solve for x
    x = 19,479,317,883.06/159,988.51
  6. Step 6: Final answer
    x = 121,754.48

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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.