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Finding the Fourth Proportional to 103,299.48, 142,600.50 and 79,417.80

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Solution

The fourth proportional to 103,299.48, 142,600.50 and 79,417.80 is: 109,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,299.48 : 142,600.50 = 79,417.80 : x
  2. Step 2: Convert to fraction form
    103,299.48/142,600.50 = 79,417.80/x
  3. Step 3: Cross multiply
    103,299.48x = 142,600.50 × 79,417.80
  4. Step 4: Simplify right side
    103,299.48x = 11,325,017,988.90
  5. Step 5: Solve for x
    x = 11,325,017,988.90/103,299.48
  6. Step 6: Final answer
    x = 109,632.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.