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Finding the Fourth Proportional to 58,321, 87,494.46 and 21,385

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Solution

The fourth proportional to 58,321, 87,494.46 and 21,385 is: 32,082.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,321 : 87,494.46 = 21,385 : x
  2. Step 2: Convert to fraction form
    58,321/87,494.46 = 21,385/x
  3. Step 3: Cross multiply
    58,321x = 87,494.46 × 21,385
  4. Step 4: Simplify right side
    58,321x = 1,871,069,027.10
  5. Step 5: Solve for x
    x = 1,871,069,027.10/58,321
  6. Step 6: Final answer
    x = 32,082.25

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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.