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Finding the Fourth Proportional to 60,451.90, 90,719.16 and 21,008.68

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Solution

The fourth proportional to 60,451.90, 90,719.16 and 21,008.68 is: 31,527.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,451.90 : 90,719.16 = 21,008.68 : x
  2. Step 2: Convert to fraction form
    60,451.90/90,719.16 = 21,008.68/x
  3. Step 3: Cross multiply
    60,451.90x = 90,719.16 × 21,008.68
  4. Step 4: Simplify right side
    60,451.90x = 1,905,889,802.31
  5. Step 5: Solve for x
    x = 1,905,889,802.31/60,451.90
  6. Step 6: Final answer
    x = 31,527.38

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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.