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Finding the Fourth Proportional to 128,117.94, 176,795.33 and 71,532.90

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Solution

The fourth proportional to 128,117.94, 176,795.33 and 71,532.90 is: 98,711.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,117.94 : 176,795.33 = 71,532.90 : x
  2. Step 2: Convert to fraction form
    128,117.94/176,795.33 = 71,532.90/x
  3. Step 3: Cross multiply
    128,117.94x = 176,795.33 × 71,532.90
  4. Step 4: Simplify right side
    128,117.94x = 12,646,682,661.36
  5. Step 5: Solve for x
    x = 12,646,682,661.36/128,117.94
  6. Step 6: Final answer
    x = 98,711.26

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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.