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Finding the Fourth Proportional to 103,262.65, 142,501.55 and 57,939.71

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Solution

The fourth proportional to 103,262.65, 142,501.55 and 57,939.71 is: 79,956.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,262.65 : 142,501.55 = 57,939.71 : x
  2. Step 2: Convert to fraction form
    103,262.65/142,501.55 = 57,939.71/x
  3. Step 3: Cross multiply
    103,262.65x = 142,501.55 × 57,939.71
  4. Step 4: Simplify right side
    103,262.65x = 8,256,497,479.34
  5. Step 5: Solve for x
    x = 8,256,497,479.34/103,262.65
  6. Step 6: Final answer
    x = 79,956.28

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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.