Home / 128,853.28-177,814.20-71,492.39

Finding the Fourth Proportional to 128,853.28, 177,814.20 and 71,492.39

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Solution

The fourth proportional to 128,853.28, 177,814.20 and 71,492.39 is: 98,657.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,853.28 : 177,814.20 = 71,492.39 : x
  2. Step 2: Convert to fraction form
    128,853.28/177,814.20 = 71,492.39/x
  3. Step 3: Cross multiply
    128,853.28x = 177,814.20 × 71,492.39
  4. Step 4: Simplify right side
    128,853.28x = 12,712,362,179.77
  5. Step 5: Solve for x
    x = 12,712,362,179.77/128,853.28
  6. Step 6: Final answer
    x = 98,657.65

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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.