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Finding the Fourth Proportional to 81,958.40, 113,061.12 and 63,088.64

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Solution

The fourth proportional to 81,958.40, 113,061.12 and 63,088.64 is: 87,030.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,958.40 : 113,061.12 = 63,088.64 : x
  2. Step 2: Convert to fraction form
    81,958.40/113,061.12 = 63,088.64/x
  3. Step 3: Cross multiply
    81,958.40x = 113,061.12 × 63,088.64
  4. Step 4: Simplify right side
    81,958.40x = 7,132,872,297.68
  5. Step 5: Solve for x
    x = 7,132,872,297.68/81,958.40
  6. Step 6: Final answer
    x = 87,030.40

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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.