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Finding the Fourth Proportional to 103,385.70, 142,703.21 and 60,376.80

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Solution

The fourth proportional to 103,385.70, 142,703.21 and 60,376.80 is: 83,338.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,385.70 : 142,703.21 = 60,376.80 : x
  2. Step 2: Convert to fraction form
    103,385.70/142,703.21 = 60,376.80/x
  3. Step 3: Cross multiply
    103,385.70x = 142,703.21 × 60,376.80
  4. Step 4: Simplify right side
    103,385.70x = 8,615,962,154.13
  5. Step 5: Solve for x
    x = 8,615,962,154.13/103,385.70
  6. Step 6: Final answer
    x = 83,338.05

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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.