Home / 129,146.79-178,222.45-71,784.35

Finding the Fourth Proportional to 129,146.79, 178,222.45 and 71,784.35

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Solution

The fourth proportional to 129,146.79, 178,222.45 and 71,784.35 is: 99,062.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,146.79 : 178,222.45 = 71,784.35 : x
  2. Step 2: Convert to fraction form
    129,146.79/178,222.45 = 71,784.35/x
  3. Step 3: Cross multiply
    129,146.79x = 178,222.45 × 71,784.35
  4. Step 4: Simplify right side
    129,146.79x = 12,793,581,582.08
  5. Step 5: Solve for x
    x = 12,793,581,582.08/129,146.79
  6. Step 6: Final answer
    x = 99,062.33

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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.