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Finding the Fourth Proportional to 70,810.64, 97,718.67 and 38,979.53

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Solution

The fourth proportional to 70,810.64, 97,718.67 and 38,979.53 is: 53,791.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,810.64 : 97,718.67 = 38,979.53 : x
  2. Step 2: Convert to fraction form
    70,810.64/97,718.67 = 38,979.53/x
  3. Step 3: Cross multiply
    70,810.64x = 97,718.67 × 38,979.53
  4. Step 4: Simplify right side
    70,810.64x = 3,809,027,828.83
  5. Step 5: Solve for x
    x = 3,809,027,828.83/70,810.64
  6. Step 6: Final answer
    x = 53,791.74

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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.