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Finding the Fourth Proportional to 228,756.42, 315,696.39 and 126,779.72

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Solution

The fourth proportional to 228,756.42, 315,696.39 and 126,779.72 is: 174,962.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,756.42 : 315,696.39 = 126,779.72 : x
  2. Step 2: Convert to fraction form
    228,756.42/315,696.39 = 126,779.72/x
  3. Step 3: Cross multiply
    228,756.42x = 315,696.39 × 126,779.72
  4. Step 4: Simplify right side
    228,756.42x = 40,023,897,875.30
  5. Step 5: Solve for x
    x = 40,023,897,875.30/228,756.42
  6. Step 6: Final answer
    x = 174,962.95

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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.