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Finding the Fourth Proportional to 103,679.90, 155,519.85 and 70,502.30

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Solution

The fourth proportional to 103,679.90, 155,519.85 and 70,502.30 is: 105,753.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,679.90 : 155,519.85 = 70,502.30 : x
  2. Step 2: Convert to fraction form
    103,679.90/155,519.85 = 70,502.30/x
  3. Step 3: Cross multiply
    103,679.90x = 155,519.85 × 70,502.30
  4. Step 4: Simplify right side
    103,679.90x = 10,964,507,120.66
  5. Step 5: Solve for x
    x = 10,964,507,120.66/103,679.90
  6. Step 6: Final answer
    x = 105,753.45

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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.