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Finding the Fourth Proportional to 158,852.86, 219,217.65 and 90,870.57

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Solution

The fourth proportional to 158,852.86, 219,217.65 and 90,870.57 is: 125,401.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,852.86 : 219,217.65 = 90,870.57 : x
  2. Step 2: Convert to fraction form
    158,852.86/219,217.65 = 90,870.57/x
  3. Step 3: Cross multiply
    158,852.86x = 219,217.65 × 90,870.57
  4. Step 4: Simplify right side
    158,852.86x = 19,920,432,809.56
  5. Step 5: Solve for x
    x = 19,920,432,809.56/158,852.86
  6. Step 6: Final answer
    x = 125,401.79

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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.