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Finding the Fourth Proportional to 105,321.78, 145,323.95 and 59,998.77

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Solution

The fourth proportional to 105,321.78, 145,323.95 and 59,998.77 is: 82,786.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,321.78 : 145,323.95 = 59,998.77 : x
  2. Step 2: Convert to fraction form
    105,321.78/145,323.95 = 59,998.77/x
  3. Step 3: Cross multiply
    105,321.78x = 145,323.95 × 59,998.77
  4. Step 4: Simplify right side
    105,321.78x = 8,719,257,951.55
  5. Step 5: Solve for x
    x = 8,719,257,951.55/105,321.78
  6. Step 6: Final answer
    x = 82,786.85

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1.5x scale

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.