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Finding the Fourth Proportional to 221,486.90, 305,681.13 and 125,975.15

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Solution

The fourth proportional to 221,486.90, 305,681.13 and 125,975.15 is: 173,862.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,486.90 : 305,681.13 = 125,975.15 : x
  2. Step 2: Convert to fraction form
    221,486.90/305,681.13 = 125,975.15/x
  3. Step 3: Cross multiply
    221,486.90x = 305,681.13 × 125,975.15
  4. Step 4: Simplify right side
    221,486.90x = 38,508,226,203.92
  5. Step 5: Solve for x
    x = 38,508,226,203.92/221,486.90
  6. Step 6: Final answer
    x = 173,862.32

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1.5x scale

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.