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Finding the Fourth Proportional to 71,288.51, 98,376.68 and 39,455.51

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Solution

The fourth proportional to 71,288.51, 98,376.68 and 39,455.51 is: 54,447.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,288.51 : 98,376.68 = 39,455.51 : x
  2. Step 2: Convert to fraction form
    71,288.51/98,376.68 = 39,455.51/x
  3. Step 3: Cross multiply
    71,288.51x = 98,376.68 × 39,455.51
  4. Step 4: Simplify right side
    71,288.51x = 3,881,501,884.23
  5. Step 5: Solve for x
    x = 3,881,501,884.23/71,288.51
  6. Step 6: Final answer
    x = 54,447.79

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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.