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Finding the Fourth Proportional to 85,807.32, 118,394.76 and 51,821.32

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Solution

The fourth proportional to 85,807.32, 118,394.76 and 51,821.32 is: 71,501.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,807.32 : 118,394.76 = 51,821.32 : x
  2. Step 2: Convert to fraction form
    85,807.32/118,394.76 = 51,821.32/x
  3. Step 3: Cross multiply
    85,807.32x = 118,394.76 × 51,821.32
  4. Step 4: Simplify right side
    85,807.32x = 6,135,372,744.28
  5. Step 5: Solve for x
    x = 6,135,372,744.28/85,807.32
  6. Step 6: Final answer
    x = 71,501.74

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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.