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Finding the Fourth Proportional to 85,530.52, 128,280.66 and 23,205.88

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Solution

The fourth proportional to 85,530.52, 128,280.66 and 23,205.88 is: 34,804.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,530.52 : 128,280.66 = 23,205.88 : x
  2. Step 2: Convert to fraction form
    85,530.52/128,280.66 = 23,205.88/x
  3. Step 3: Cross multiply
    85,530.52x = 128,280.66 × 23,205.88
  4. Step 4: Simplify right side
    85,530.52x = 2,976,865,602.28
  5. Step 5: Solve for x
    x = 2,976,865,602.28/85,530.52
  6. Step 6: Final answer
    x = 34,804.72

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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.