Home / 128,865.03-177,835.82-72,275.19

Finding the Fourth Proportional to 128,865.03, 177,835.82 and 72,275.19

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Solution

The fourth proportional to 128,865.03, 177,835.82 and 72,275.19 is: 99,740.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,865.03 : 177,835.82 = 72,275.19 : x
  2. Step 2: Convert to fraction form
    128,865.03/177,835.82 = 72,275.19/x
  3. Step 3: Cross multiply
    128,865.03x = 177,835.82 × 72,275.19
  4. Step 4: Simplify right side
    128,865.03x = 12,853,117,317.93
  5. Step 5: Solve for x
    x = 12,853,117,317.93/128,865.03
  6. Step 6: Final answer
    x = 99,740.93

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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.