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Finding the Fourth Proportional to 121,220.90, 181,859.96 and 38,114.90

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Solution

The fourth proportional to 121,220.90, 181,859.96 and 38,114.90 is: 57,181.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,220.90 : 181,859.96 = 38,114.90 : x
  2. Step 2: Convert to fraction form
    121,220.90/181,859.96 = 38,114.90/x
  3. Step 3: Cross multiply
    121,220.90x = 181,859.96 × 38,114.90
  4. Step 4: Simplify right side
    121,220.90x = 6,931,574,189.40
  5. Step 5: Solve for x
    x = 6,931,574,189.40/121,220.90
  6. Step 6: Final answer
    x = 57,181.35

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1.5x scale

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.