Home / 129,449.63-178,548.45-86,407.43

Finding the Fourth Proportional to 129,449.63, 178,548.45 and 86,407.43

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Solution

The fourth proportional to 129,449.63, 178,548.45 and 86,407.43 is: 119,180.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,449.63 : 178,548.45 = 86,407.43 : x
  2. Step 2: Convert to fraction form
    129,449.63/178,548.45 = 86,407.43/x
  3. Step 3: Cross multiply
    129,449.63x = 178,548.45 × 86,407.43
  4. Step 4: Simplify right side
    129,449.63x = 15,427,911,802.24
  5. Step 5: Solve for x
    x = 15,427,911,802.24/129,449.63
  6. Step 6: Final answer
    x = 119,180.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.