Home / 128,925.20-193,128.60-73,456.40

Finding the Fourth Proportional to 128,925.20, 193,128.60 and 73,456.40

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Solution

The fourth proportional to 128,925.20, 193,128.60 and 73,456.40 is: 110,036.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,925.20 : 193,128.60 = 73,456.40 : x
  2. Step 2: Convert to fraction form
    128,925.20/193,128.60 = 73,456.40/x
  3. Step 3: Cross multiply
    128,925.20x = 193,128.60 × 73,456.40
  4. Step 4: Simplify right side
    128,925.20x = 14,186,531,693.04
  5. Step 5: Solve for x
    x = 14,186,531,693.04/128,925.20
  6. Step 6: Final answer
    x = 110,036.92

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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.