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Finding the Fourth Proportional to 103,041.95, 142,073.46 and 80,078.45

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Solution

The fourth proportional to 103,041.95, 142,073.46 and 80,078.45 is: 110,411.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,041.95 : 142,073.46 = 80,078.45 : x
  2. Step 2: Convert to fraction form
    103,041.95/142,073.46 = 80,078.45/x
  3. Step 3: Cross multiply
    103,041.95x = 142,073.46 × 80,078.45
  4. Step 4: Simplify right side
    103,041.95x = 11,377,021,752.57
  5. Step 5: Solve for x
    x = 11,377,021,752.57/103,041.95
  6. Step 6: Final answer
    x = 110,411.56

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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.