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Finding the Fourth Proportional to 128,117.44, 176,794.64 and 71,532.40

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Solution

The fourth proportional to 128,117.44, 176,794.64 and 71,532.40 is: 98,710.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,117.44 : 176,794.64 = 71,532.40 : x
  2. Step 2: Convert to fraction form
    128,117.44/176,794.64 = 71,532.40/x
  3. Step 3: Cross multiply
    128,117.44x = 176,794.64 × 71,532.40
  4. Step 4: Simplify right side
    128,117.44x = 12,646,544,906.34
  5. Step 5: Solve for x
    x = 12,646,544,906.34/128,117.44
  6. Step 6: Final answer
    x = 98,710.57

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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.