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Finding the Fourth Proportional to 84,973.20, 127,459.80 and 71,149.20

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Solution

The fourth proportional to 84,973.20, 127,459.80 and 71,149.20 is: 106,723.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,973.20 : 127,459.80 = 71,149.20 : x
  2. Step 2: Convert to fraction form
    84,973.20/127,459.80 = 71,149.20/x
  3. Step 3: Cross multiply
    84,973.20x = 127,459.80 × 71,149.20
  4. Step 4: Simplify right side
    84,973.20x = 9,068,662,802.16
  5. Step 5: Solve for x
    x = 9,068,662,802.16/84,973.20
  6. Step 6: Final answer
    x = 106,723.80

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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.