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Finding the Fourth Proportional to 58,055.16, 87,121.60 and 21,119.16

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Solution

The fourth proportional to 58,055.16, 87,121.60 and 21,119.16 is: 31,692.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,055.16 : 87,121.60 = 21,119.16 : x
  2. Step 2: Convert to fraction form
    58,055.16/87,121.60 = 21,119.16/x
  3. Step 3: Cross multiply
    58,055.16x = 87,121.60 × 21,119.16
  4. Step 4: Simplify right side
    58,055.16x = 1,839,935,009.86
  5. Step 5: Solve for x
    x = 1,839,935,009.86/58,055.16
  6. Step 6: Final answer
    x = 31,692.88

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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.