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Finding the Fourth Proportional to 76,659.95, 105,790.57 and 43,125.95

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Solution

The fourth proportional to 76,659.95, 105,790.57 and 43,125.95 is: 59,513.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,659.95 : 105,790.57 = 43,125.95 : x
  2. Step 2: Convert to fraction form
    76,659.95/105,790.57 = 43,125.95/x
  3. Step 3: Cross multiply
    76,659.95x = 105,790.57 × 43,125.95
  4. Step 4: Simplify right side
    76,659.95x = 4,562,318,832.29
  5. Step 5: Solve for x
    x = 4,562,318,832.29/76,659.95
  6. Step 6: Final answer
    x = 59,513.72

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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.