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Finding the Fourth Proportional to 85,130.31, 127,808.33 and 72,730.02

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Solution

The fourth proportional to 85,130.31, 127,808.33 and 72,730.02 is: 109,191.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,130.31 : 127,808.33 = 72,730.02 : x
  2. Step 2: Convert to fraction form
    85,130.31/127,808.33 = 72,730.02/x
  3. Step 3: Cross multiply
    85,130.31x = 127,808.33 × 72,730.02
  4. Step 4: Simplify right side
    85,130.31x = 9,295,502,033.42
  5. Step 5: Solve for x
    x = 9,295,502,033.42/85,130.31
  6. Step 6: Final answer
    x = 109,191.45

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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.