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Finding the Fourth Proportional to 60,571.70, 90,825.15 and 21,130.10

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Solution

The fourth proportional to 60,571.70, 90,825.15 and 21,130.10 is: 31,683.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,571.70 : 90,825.15 = 21,130.10 : x
  2. Step 2: Convert to fraction form
    60,571.70/90,825.15 = 21,130.10/x
  3. Step 3: Cross multiply
    60,571.70x = 90,825.15 × 21,130.10
  4. Step 4: Simplify right side
    60,571.70x = 1,919,144,502.02
  5. Step 5: Solve for x
    x = 1,919,144,502.02/60,571.70
  6. Step 6: Final answer
    x = 31,683.85

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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.