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Finding the Fourth Proportional to 59,989.90, 89,995.78 and 30,019.81

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Solution

The fourth proportional to 59,989.90, 89,995.78 and 30,019.81 is: 45,035.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,989.90 : 89,995.78 = 30,019.81 : x
  2. Step 2: Convert to fraction form
    59,989.90/89,995.78 = 30,019.81/x
  3. Step 3: Cross multiply
    59,989.90x = 89,995.78 × 30,019.81
  4. Step 4: Simplify right side
    59,989.90x = 2,701,656,216.48
  5. Step 5: Solve for x
    x = 2,701,656,216.48/59,989.90
  6. Step 6: Final answer
    x = 45,035.19

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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.