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Finding the Fourth Proportional to 170,079.55, 255,118.81 and 81,312.29

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Solution

The fourth proportional to 170,079.55, 255,118.81 and 81,312.29 is: 121,968.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,079.55 : 255,118.81 = 81,312.29 : x
  2. Step 2: Convert to fraction form
    170,079.55/255,118.81 = 81,312.29/x
  3. Step 3: Cross multiply
    170,079.55x = 255,118.81 × 81,312.29
  4. Step 4: Simplify right side
    170,079.55x = 20,744,294,663.17
  5. Step 5: Solve for x
    x = 20,744,294,663.17/170,079.55
  6. Step 6: Final answer
    x = 121,968.19

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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.