Home / 128,971.48-177,929.78-74,487.64

Finding the Fourth Proportional to 128,971.48, 177,929.78 and 74,487.64

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Solution

The fourth proportional to 128,971.48, 177,929.78 and 74,487.64 is: 102,763.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,971.48 : 177,929.78 = 74,487.64 : x
  2. Step 2: Convert to fraction form
    128,971.48/177,929.78 = 74,487.64/x
  3. Step 3: Cross multiply
    128,971.48x = 177,929.78 × 74,487.64
  4. Step 4: Simplify right side
    128,971.48x = 13,253,569,397.92
  5. Step 5: Solve for x
    x = 13,253,569,397.92/128,971.48
  6. Step 6: Final answer
    x = 102,763.57

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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.