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Finding the Fourth Proportional to 85,859.52, 128,833.02 and 39,106.32

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Solution

The fourth proportional to 85,859.52, 128,833.02 and 39,106.32 is: 58,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,859.52 : 128,833.02 = 39,106.32 : x
  2. Step 2: Convert to fraction form
    85,859.52/128,833.02 = 39,106.32/x
  3. Step 3: Cross multiply
    85,859.52x = 128,833.02 × 39,106.32
  4. Step 4: Simplify right side
    85,859.52x = 5,038,185,306.69
  5. Step 5: Solve for x
    x = 5,038,185,306.69/85,859.52
  6. Step 6: Final answer
    x = 58,679.40

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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.