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Finding the Fourth Proportional to 64,422.81, 88,903.17 and 36,128.50

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Solution

The fourth proportional to 64,422.81, 88,903.17 and 36,128.50 is: 49,857.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,422.81 : 88,903.17 = 36,128.50 : x
  2. Step 2: Convert to fraction form
    64,422.81/88,903.17 = 36,128.50/x
  3. Step 3: Cross multiply
    64,422.81x = 88,903.17 × 36,128.50
  4. Step 4: Simplify right side
    64,422.81x = 3,211,937,955.09
  5. Step 5: Solve for x
    x = 3,211,937,955.09/64,422.81
  6. Step 6: Final answer
    x = 49,857.15

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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.