Home / 128,112.48-176,795.52-70,750.76

Finding the Fourth Proportional to 128,112.48, 176,795.52 and 70,750.76

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Solution

The fourth proportional to 128,112.48, 176,795.52 and 70,750.76 is: 97,636.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,112.48 : 176,795.52 = 70,750.76 : x
  2. Step 2: Convert to fraction form
    128,112.48/176,795.52 = 70,750.76/x
  3. Step 3: Cross multiply
    128,112.48x = 176,795.52 × 70,750.76
  4. Step 4: Simplify right side
    128,112.48x = 12,508,416,520.62
  5. Step 5: Solve for x
    x = 12,508,416,520.62/128,112.48
  6. Step 6: Final answer
    x = 97,636.21

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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.