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Finding the Fourth Proportional to 83,720.55, 115,467.54 and 55,069.63

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Solution

The fourth proportional to 83,720.55, 115,467.54 and 55,069.63 is: 75,952.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,720.55 : 115,467.54 = 55,069.63 : x
  2. Step 2: Convert to fraction form
    83,720.55/115,467.54 = 55,069.63/x
  3. Step 3: Cross multiply
    83,720.55x = 115,467.54 × 55,069.63
  4. Step 4: Simplify right side
    83,720.55x = 6,358,754,704.81
  5. Step 5: Solve for x
    x = 6,358,754,704.81/83,720.55
  6. Step 6: Final answer
    x = 75,952.14

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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.