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Finding the Fourth Proportional to 71,318.32, 98,420.80 and 39,054.32

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Solution

The fourth proportional to 71,318.32, 98,420.80 and 39,054.32 is: 53,895.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,318.32 : 98,420.80 = 39,054.32 : x
  2. Step 2: Convert to fraction form
    71,318.32/98,420.80 = 39,054.32/x
  3. Step 3: Cross multiply
    71,318.32x = 98,420.80 × 39,054.32
  4. Step 4: Simplify right side
    71,318.32x = 3,843,757,417.86
  5. Step 5: Solve for x
    x = 3,843,757,417.86/71,318.32
  6. Step 6: Final answer
    x = 53,895.79

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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.