Home / 102,638.90-154,011.20-77,670.65

Finding the Fourth Proportional to 102,638.90, 154,011.20 and 77,670.65

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Solution

The fourth proportional to 102,638.90, 154,011.20 and 77,670.65 is: 116,545.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,638.90 : 154,011.20 = 77,670.65 : x
  2. Step 2: Convert to fraction form
    102,638.90/154,011.20 = 77,670.65/x
  3. Step 3: Cross multiply
    102,638.90x = 154,011.20 × 77,670.65
  4. Step 4: Simplify right side
    102,638.90x = 11,962,148,852.87
  5. Step 5: Solve for x
    x = 11,962,148,852.87/102,638.90
  6. Step 6: Final answer
    x = 116,545.96

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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.