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Finding the Fourth Proportional to 85,475.80, 117,889.35 and 79,746.28

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Solution

The fourth proportional to 85,475.80, 117,889.35 and 79,746.28 is: 109,987.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,475.80 : 117,889.35 = 79,746.28 : x
  2. Step 2: Convert to fraction form
    85,475.80/117,889.35 = 79,746.28/x
  3. Step 3: Cross multiply
    85,475.80x = 117,889.35 × 79,746.28
  4. Step 4: Simplify right side
    85,475.80x = 9,401,237,114.12
  5. Step 5: Solve for x
    x = 9,401,237,114.12/85,475.80
  6. Step 6: Final answer
    x = 109,987.12

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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.