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Finding the Fourth Proportional to 64,015.81, 88,341.92 and 35,720.89

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Solution

The fourth proportional to 64,015.81, 88,341.92 and 35,720.89 is: 49,294.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,015.81 : 88,341.92 = 35,720.89 : x
  2. Step 2: Convert to fraction form
    64,015.81/88,341.92 = 35,720.89/x
  3. Step 3: Cross multiply
    64,015.81x = 88,341.92 × 35,720.89
  4. Step 4: Simplify right side
    64,015.81x = 3,155,651,828.10
  5. Step 5: Solve for x
    x = 3,155,651,828.10/64,015.81
  6. Step 6: Final answer
    x = 49,294.88

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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.