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Finding the Fourth Proportional to 138,465.51, 191,082.66 and 80,333.52

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Solution

The fourth proportional to 138,465.51, 191,082.66 and 80,333.52 is: 110,860.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,465.51 : 191,082.66 = 80,333.52 : x
  2. Step 2: Convert to fraction form
    138,465.51/191,082.66 = 80,333.52/x
  3. Step 3: Cross multiply
    138,465.51x = 191,082.66 × 80,333.52
  4. Step 4: Simplify right side
    138,465.51x = 15,350,342,688.76
  5. Step 5: Solve for x
    x = 15,350,342,688.76/138,465.51
  6. Step 6: Final answer
    x = 110,860.41

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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.