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Finding the Fourth Proportional to 61,079.51, 91,585.95 and 18,378.71

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Solution

The fourth proportional to 61,079.51, 91,585.95 and 18,378.71 is: 27,558.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,079.51 : 91,585.95 = 18,378.71 : x
  2. Step 2: Convert to fraction form
    61,079.51/91,585.95 = 18,378.71/x
  3. Step 3: Cross multiply
    61,079.51x = 91,585.95 × 18,378.71
  4. Step 4: Simplify right side
    61,079.51x = 1,683,231,741.00
  5. Step 5: Solve for x
    x = 1,683,231,741.00/61,079.51
  6. Step 6: Final answer
    x = 27,558.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.