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Finding the Fourth Proportional to 74,484.66, 102,790.71 and 42,663.81

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Solution

The fourth proportional to 74,484.66, 102,790.71 and 42,663.81 is: 58,877.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,484.66 : 102,790.71 = 42,663.81 : x
  2. Step 2: Convert to fraction form
    74,484.66/102,790.71 = 42,663.81/x
  3. Step 3: Cross multiply
    74,484.66x = 102,790.71 × 42,663.81
  4. Step 4: Simplify right side
    74,484.66x = 4,385,443,321.21
  5. Step 5: Solve for x
    x = 4,385,443,321.21/74,484.66
  6. Step 6: Final answer
    x = 58,877.13

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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.