Home / 103,513.50-142,957.06-71,331.80

Finding the Fourth Proportional to 103,513.50, 142,957.06 and 71,331.80

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Solution

The fourth proportional to 103,513.50, 142,957.06 and 71,331.80 is: 98,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,513.50 : 142,957.06 = 71,331.80 : x
  2. Step 2: Convert to fraction form
    103,513.50/142,957.06 = 71,331.80/x
  3. Step 3: Cross multiply
    103,513.50x = 142,957.06 × 71,331.80
  4. Step 4: Simplify right side
    103,513.50x = 10,197,383,519.39
  5. Step 5: Solve for x
    x = 10,197,383,519.39/103,513.50
  6. Step 6: Final answer
    x = 98,512.60

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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.