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Finding the Fourth Proportional to 102,988.72, 142,124.79 and 57,668.68

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Solution

The fourth proportional to 102,988.72, 142,124.79 and 57,668.68 is: 79,582.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,988.72 : 142,124.79 = 57,668.68 : x
  2. Step 2: Convert to fraction form
    102,988.72/142,124.79 = 57,668.68/x
  3. Step 3: Cross multiply
    102,988.72x = 142,124.79 × 57,668.68
  4. Step 4: Simplify right side
    102,988.72x = 8,196,149,034.58
  5. Step 5: Solve for x
    x = 8,196,149,034.58/102,988.72
  6. Step 6: Final answer
    x = 79,582.98

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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.