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Finding the Fourth Proportional to 228,065.70, 342,066.15 and 78,312.90

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Solution

The fourth proportional to 228,065.70, 342,066.15 and 78,312.90 is: 117,458.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,065.70 : 342,066.15 = 78,312.90 : x
  2. Step 2: Convert to fraction form
    228,065.70/342,066.15 = 78,312.90/x
  3. Step 3: Cross multiply
    228,065.70x = 342,066.15 × 78,312.90
  4. Step 4: Simplify right side
    228,065.70x = 26,788,192,198.34
  5. Step 5: Solve for x
    x = 26,788,192,198.34/228,065.70
  6. Step 6: Final answer
    x = 117,458.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.