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Finding the Fourth Proportional to 60,472.85, 90,710.08 and 21,030.71

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Solution

The fourth proportional to 60,472.85, 90,710.08 and 21,030.71 is: 31,546.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,472.85 : 90,710.08 = 21,030.71 : x
  2. Step 2: Convert to fraction form
    60,472.85/90,710.08 = 21,030.71/x
  3. Step 3: Cross multiply
    60,472.85x = 90,710.08 × 21,030.71
  4. Step 4: Simplify right side
    60,472.85x = 1,907,696,880.43
  5. Step 5: Solve for x
    x = 1,907,696,880.43/60,472.85
  6. Step 6: Final answer
    x = 31,546.34

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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.