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Finding the Fourth Proportional to 81,410.40, 121,856.40 and 58,082.40

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Solution

The fourth proportional to 81,410.40, 121,856.40 and 58,082.40 is: 86,938.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,410.40 : 121,856.40 = 58,082.40 : x
  2. Step 2: Convert to fraction form
    81,410.40/121,856.40 = 58,082.40/x
  3. Step 3: Cross multiply
    81,410.40x = 121,856.40 × 58,082.40
  4. Step 4: Simplify right side
    81,410.40x = 7,077,712,167.36
  5. Step 5: Solve for x
    x = 7,077,712,167.36/81,410.40
  6. Step 6: Final answer
    x = 86,938.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.