Home / 128,458.10-177,272.34-71,869.52

Finding the Fourth Proportional to 128,458.10, 177,272.34 and 71,869.52

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Solution

The fourth proportional to 128,458.10, 177,272.34 and 71,869.52 is: 99,180.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,458.10 : 177,272.34 = 71,869.52 : x
  2. Step 2: Convert to fraction form
    128,458.10/177,272.34 = 71,869.52/x
  3. Step 3: Cross multiply
    128,458.10x = 177,272.34 × 71,869.52
  4. Step 4: Simplify right side
    128,458.10x = 12,740,478,158.75
  5. Step 5: Solve for x
    x = 12,740,478,158.75/128,458.10
  6. Step 6: Final answer
    x = 99,180.03

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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.