Home / 102,958.23-142,353.47-90,174.76

Finding the Fourth Proportional to 102,958.23, 142,353.47 and 90,174.76

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Solution

The fourth proportional to 102,958.23, 142,353.47 and 90,174.76 is: 124,678.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,958.23 : 142,353.47 = 90,174.76 : x
  2. Step 2: Convert to fraction form
    102,958.23/142,353.47 = 90,174.76/x
  3. Step 3: Cross multiply
    102,958.23x = 142,353.47 × 90,174.76
  4. Step 4: Simplify right side
    102,958.23x = 12,836,689,992.42
  5. Step 5: Solve for x
    x = 12,836,689,992.42/102,958.23
  6. Step 6: Final answer
    x = 124,678.62

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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.