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Finding the Fourth Proportional to 72,091.76, 107,986.95 and 57,975.57

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Solution

The fourth proportional to 72,091.76, 107,986.95 and 57,975.57 is: 86,842.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,091.76 : 107,986.95 = 57,975.57 : x
  2. Step 2: Convert to fraction form
    72,091.76/107,986.95 = 57,975.57/x
  3. Step 3: Cross multiply
    72,091.76x = 107,986.95 × 57,975.57
  4. Step 4: Simplify right side
    72,091.76x = 6,260,604,978.81
  5. Step 5: Solve for x
    x = 6,260,604,978.81/72,091.76
  6. Step 6: Final answer
    x = 86,842.18

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1.5x scale

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.