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Finding the Fourth Proportional to 85,129.31, 117,482.10 and 47,403.56

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Solution

The fourth proportional to 85,129.31, 117,482.10 and 47,403.56 is: 65,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,129.31 : 117,482.10 = 47,403.56 : x
  2. Step 2: Convert to fraction form
    85,129.31/117,482.10 = 47,403.56/x
  3. Step 3: Cross multiply
    85,129.31x = 117,482.10 × 47,403.56
  4. Step 4: Simplify right side
    85,129.31x = 5,569,069,892.22
  5. Step 5: Solve for x
    x = 5,569,069,892.22/85,129.31
  6. Step 6: Final answer
    x = 65,418.95

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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.