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Finding the Fourth Proportional to 85,017.80, 127,526.70 and 69,984.20

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Solution

The fourth proportional to 85,017.80, 127,526.70 and 69,984.20 is: 104,976.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,017.80 : 127,526.70 = 69,984.20 : x
  2. Step 2: Convert to fraction form
    85,017.80/127,526.70 = 69,984.20/x
  3. Step 3: Cross multiply
    85,017.80x = 127,526.70 × 69,984.20
  4. Step 4: Simplify right side
    85,017.80x = 8,924,854,078.14
  5. Step 5: Solve for x
    x = 8,924,854,078.14/85,017.80
  6. Step 6: Final answer
    x = 104,976.30

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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.