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Finding the Fourth Proportional to 60,478.88, 90,727.28 and 18,920.48

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Solution

The fourth proportional to 60,478.88, 90,727.28 and 18,920.48 is: 28,383.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,478.88 : 90,727.28 = 18,920.48 : x
  2. Step 2: Convert to fraction form
    60,478.88/90,727.28 = 18,920.48/x
  3. Step 3: Cross multiply
    60,478.88x = 90,727.28 × 18,920.48
  4. Step 4: Simplify right side
    60,478.88x = 1,716,603,686.69
  5. Step 5: Solve for x
    x = 1,716,603,686.69/60,478.88
  6. Step 6: Final answer
    x = 28,383.52

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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.