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Finding the Fourth Proportional to 85,279.68, 117,686.88 and 47,554.56

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Solution

The fourth proportional to 85,279.68, 117,686.88 and 47,554.56 is: 65,625.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,279.68 : 117,686.88 = 47,554.56 : x
  2. Step 2: Convert to fraction form
    85,279.68/117,686.88 = 47,554.56/x
  3. Step 3: Cross multiply
    85,279.68x = 117,686.88 × 47,554.56
  4. Step 4: Simplify right side
    85,279.68x = 5,596,547,796.17
  5. Step 5: Solve for x
    x = 5,596,547,796.17/85,279.68
  6. Step 6: Final answer
    x = 65,625.81

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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.