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Finding the Fourth Proportional to 83,980.80, 121,305.60 and 83,980.80

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Solution

The fourth proportional to 83,980.80, 121,305.60 and 83,980.80 is: 121,305.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,980.80 : 121,305.60 = 83,980.80 : x
  2. Step 2: Convert to fraction form
    83,980.80/121,305.60 = 83,980.80/x
  3. Step 3: Cross multiply
    83,980.80x = 121,305.60 × 83,980.80
  4. Step 4: Simplify right side
    83,980.80x = 10,187,341,332.48
  5. Step 5: Solve for x
    x = 10,187,341,332.48/83,980.80
  6. Step 6: Final answer
    x = 121,305.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.