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Finding the Fourth Proportional to 84,986.80, 127,528.80 and 58,710.40

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Solution

The fourth proportional to 84,986.80, 127,528.80 and 58,710.40 is: 88,099.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,986.80 : 127,528.80 = 58,710.40 : x
  2. Step 2: Convert to fraction form
    84,986.80/127,528.80 = 58,710.40/x
  3. Step 3: Cross multiply
    84,986.80x = 127,528.80 × 58,710.40
  4. Step 4: Simplify right side
    84,986.80x = 7,487,266,859.52
  5. Step 5: Solve for x
    x = 7,487,266,859.52/84,986.80
  6. Step 6: Final answer
    x = 88,099.17

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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.