Home / 81,465.16-122,038.64-38,709.76

Finding the Fourth Proportional to 81,465.16, 122,038.64 and 38,709.76

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Solution

The fourth proportional to 81,465.16, 122,038.64 and 38,709.76 is: 57,989.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,465.16 : 122,038.64 = 38,709.76 : x
  2. Step 2: Convert to fraction form
    81,465.16/122,038.64 = 38,709.76/x
  3. Step 3: Cross multiply
    81,465.16x = 122,038.64 × 38,709.76
  4. Step 4: Simplify right side
    81,465.16x = 4,724,086,465.13
  5. Step 5: Solve for x
    x = 4,724,086,465.13/81,465.16
  6. Step 6: Final answer
    x = 57,989.04

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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.