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Finding the Fourth Proportional to 58,643.70, 87,965.55 and 19,191.30

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Solution

The fourth proportional to 58,643.70, 87,965.55 and 19,191.30 is: 28,786.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,643.70 : 87,965.55 = 19,191.30 : x
  2. Step 2: Convert to fraction form
    58,643.70/87,965.55 = 19,191.30/x
  3. Step 3: Cross multiply
    58,643.70x = 87,965.55 × 19,191.30
  4. Step 4: Simplify right side
    58,643.70x = 1,688,173,259.72
  5. Step 5: Solve for x
    x = 1,688,173,259.72/58,643.70
  6. Step 6: Final answer
    x = 28,786.95

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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.