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Finding the Fourth Proportional to 74,790.78, 103,192.86 and 45,711.78

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Solution

The fourth proportional to 74,790.78, 103,192.86 and 45,711.78 is: 63,071.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,790.78 : 103,192.86 = 45,711.78 : x
  2. Step 2: Convert to fraction form
    74,790.78/103,192.86 = 45,711.78/x
  3. Step 3: Cross multiply
    74,790.78x = 103,192.86 × 45,711.78
  4. Step 4: Simplify right side
    74,790.78x = 4,717,129,313.89
  5. Step 5: Solve for x
    x = 4,717,129,313.89/74,790.78
  6. Step 6: Final answer
    x = 63,071.00

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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.