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Finding the Fourth Proportional to 83,707.04, 115,480.14 and 70,905.80

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Solution

The fourth proportional to 83,707.04, 115,480.14 and 70,905.80 is: 97,819.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,707.04 : 115,480.14 = 70,905.80 : x
  2. Step 2: Convert to fraction form
    83,707.04/115,480.14 = 70,905.80/x
  3. Step 3: Cross multiply
    83,707.04x = 115,480.14 × 70,905.80
  4. Step 4: Simplify right side
    83,707.04x = 8,188,211,710.81
  5. Step 5: Solve for x
    x = 8,188,211,710.81/83,707.04
  6. Step 6: Final answer
    x = 97,819.87

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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.