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Finding the Fourth Proportional to 60,480.80, 90,721.20 and 18,922.40

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Solution

The fourth proportional to 60,480.80, 90,721.20 and 18,922.40 is: 28,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,480.80 : 90,721.20 = 18,922.40 : x
  2. Step 2: Convert to fraction form
    60,480.80/90,721.20 = 18,922.40/x
  3. Step 3: Cross multiply
    60,480.80x = 90,721.20 × 18,922.40
  4. Step 4: Simplify right side
    60,480.80x = 1,716,662,834.88
  5. Step 5: Solve for x
    x = 1,716,662,834.88/60,480.80
  6. Step 6: Final answer
    x = 28,383.60

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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.