Home / 128,667.64-177,561.76-71,307.90

Finding the Fourth Proportional to 128,667.64, 177,561.76 and 71,307.90

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Solution

The fourth proportional to 128,667.64, 177,561.76 and 71,307.90 is: 98,405.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,667.64 : 177,561.76 = 71,307.90 : x
  2. Step 2: Convert to fraction form
    128,667.64/177,561.76 = 71,307.90/x
  3. Step 3: Cross multiply
    128,667.64x = 177,561.76 × 71,307.90
  4. Step 4: Simplify right side
    128,667.64x = 12,661,556,225.90
  5. Step 5: Solve for x
    x = 12,661,556,225.90/128,667.64
  6. Step 6: Final answer
    x = 98,405.13

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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.