Home / 129,030.36-178,135.92-85,998.48

Finding the Fourth Proportional to 129,030.36, 178,135.92 and 85,998.48

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Solution

The fourth proportional to 129,030.36, 178,135.92 and 85,998.48 is: 118,727.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,030.36 : 178,135.92 = 85,998.48 : x
  2. Step 2: Convert to fraction form
    129,030.36/178,135.92 = 85,998.48/x
  3. Step 3: Cross multiply
    129,030.36x = 178,135.92 × 85,998.48
  4. Step 4: Simplify right side
    129,030.36x = 15,319,418,353.40
  5. Step 5: Solve for x
    x = 15,319,418,353.40/129,030.36
  6. Step 6: Final answer
    x = 118,727.24

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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.