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Finding the Fourth Proportional to 189,032.87, 260,721.30 and 128,501.49

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Solution

The fourth proportional to 189,032.87, 260,721.30 and 128,501.49 is: 177,234.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,032.87 : 260,721.30 = 128,501.49 : x
  2. Step 2: Convert to fraction form
    189,032.87/260,721.30 = 128,501.49/x
  3. Step 3: Cross multiply
    189,032.87x = 260,721.30 × 128,501.49
  4. Step 4: Simplify right side
    189,032.87x = 33,503,074,882.23
  5. Step 5: Solve for x
    x = 33,503,074,882.23/189,032.87
  6. Step 6: Final answer
    x = 177,234.13

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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.