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Finding the Fourth Proportional to 58,778.81, 81,064.80 and 39,655.52

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Solution

The fourth proportional to 58,778.81, 81,064.80 and 39,655.52 is: 54,690.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,778.81 : 81,064.80 = 39,655.52 : x
  2. Step 2: Convert to fraction form
    58,778.81/81,064.80 = 39,655.52/x
  3. Step 3: Cross multiply
    58,778.81x = 81,064.80 × 39,655.52
  4. Step 4: Simplify right side
    58,778.81x = 3,214,667,152.35
  5. Step 5: Solve for x
    x = 3,214,667,152.35/58,778.81
  6. Step 6: Final answer
    x = 54,690.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.