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Finding the Fourth Proportional to 85,720.72, 118,275.48 and 51,734.74

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Solution

The fourth proportional to 85,720.72, 118,275.48 and 51,734.74 is: 71,382.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,720.72 : 118,275.48 = 51,734.74 : x
  2. Step 2: Convert to fraction form
    85,720.72/118,275.48 = 51,734.74/x
  3. Step 3: Cross multiply
    85,720.72x = 118,275.48 × 51,734.74
  4. Step 4: Simplify right side
    85,720.72x = 6,118,951,206.18
  5. Step 5: Solve for x
    x = 6,118,951,206.18/85,720.72
  6. Step 6: Final answer
    x = 71,382.41

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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.