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Finding the Fourth Proportional to 60,140.72, 90,222.42 and 18,578

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Solution

The fourth proportional to 60,140.72, 90,222.42 and 18,578 is: 27,870.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,140.72 : 90,222.42 = 18,578 : x
  2. Step 2: Convert to fraction form
    60,140.72/90,222.42 = 18,578/x
  3. Step 3: Cross multiply
    60,140.72x = 90,222.42 × 18,578
  4. Step 4: Simplify right side
    60,140.72x = 1,676,152,118.76
  5. Step 5: Solve for x
    x = 1,676,152,118.76/60,140.72
  6. Step 6: Final answer
    x = 27,870.50

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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.