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Finding the Fourth Proportional to 74,360, 102,616.80 and 40,828.16

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Solution

The fourth proportional to 74,360, 102,616.80 and 40,828.16 is: 56,342.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,360 : 102,616.80 = 40,828.16 : x
  2. Step 2: Convert to fraction form
    74,360/102,616.80 = 40,828.16/x
  3. Step 3: Cross multiply
    74,360x = 102,616.80 × 40,828.16
  4. Step 4: Simplify right side
    74,360x = 4,189,655,129.09
  5. Step 5: Solve for x
    x = 4,189,655,129.09/74,360
  6. Step 6: Final answer
    x = 56,342.86

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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.