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Finding the Fourth Proportional to 58,154.64, 87,257.88 and 21,210

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Solution

The fourth proportional to 58,154.64, 87,257.88 and 21,210 is: 31,824.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,154.64 : 87,257.88 = 21,210 : x
  2. Step 2: Convert to fraction form
    58,154.64/87,257.88 = 21,210/x
  3. Step 3: Cross multiply
    58,154.64x = 87,257.88 × 21,210
  4. Step 4: Simplify right side
    58,154.64x = 1,850,739,634.80
  5. Step 5: Solve for x
    x = 1,850,739,634.80/58,154.64
  6. Step 6: Final answer
    x = 31,824.45

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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.