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Finding the Fourth Proportional to 128,055.55, 176,734.47 and 71,470.57

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Solution

The fourth proportional to 128,055.55, 176,734.47 and 71,470.57 is: 98,639.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,055.55 : 176,734.47 = 71,470.57 : x
  2. Step 2: Convert to fraction form
    128,055.55/176,734.47 = 71,470.57/x
  3. Step 3: Cross multiply
    128,055.55x = 176,734.47 × 71,470.57
  4. Step 4: Simplify right side
    128,055.55x = 12,631,313,309.55
  5. Step 5: Solve for x
    x = 12,631,313,309.55/128,055.55
  6. Step 6: Final answer
    x = 98,639.33

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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.