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Finding the Fourth Proportional to 84,855.60, 127,283.40 and 83,543.40

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Solution

The fourth proportional to 84,855.60, 127,283.40 and 83,543.40 is: 125,315.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,855.60 : 127,283.40 = 83,543.40 : x
  2. Step 2: Convert to fraction form
    84,855.60/127,283.40 = 83,543.40/x
  3. Step 3: Cross multiply
    84,855.60x = 127,283.40 × 83,543.40
  4. Step 4: Simplify right side
    84,855.60x = 10,633,687,999.56
  5. Step 5: Solve for x
    x = 10,633,687,999.56/84,855.60
  6. Step 6: Final answer
    x = 125,315.10

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1.5x scale

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.