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Finding the Fourth Proportional to 221,281.35, 305,315.78 and 125,780.53

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Solution

The fourth proportional to 221,281.35, 305,315.78 and 125,780.53 is: 173,547.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,281.35 : 305,315.78 = 125,780.53 : x
  2. Step 2: Convert to fraction form
    221,281.35/305,315.78 = 125,780.53/x
  3. Step 3: Cross multiply
    221,281.35x = 305,315.78 × 125,780.53
  4. Step 4: Simplify right side
    221,281.35x = 38,402,779,233.57
  5. Step 5: Solve for x
    x = 38,402,779,233.57/221,281.35
  6. Step 6: Final answer
    x = 173,547.29

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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.