Home / 81,441.87-121,605.76-72,953.57

Finding the Fourth Proportional to 81,441.87, 121,605.76 and 72,953.57

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Solution

The fourth proportional to 81,441.87, 121,605.76 and 72,953.57 is: 108,931.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,441.87 : 121,605.76 = 72,953.57 : x
  2. Step 2: Convert to fraction form
    81,441.87/121,605.76 = 72,953.57/x
  3. Step 3: Cross multiply
    81,441.87x = 121,605.76 × 72,953.57
  4. Step 4: Simplify right side
    81,441.87x = 8,871,574,446.19
  5. Step 5: Solve for x
    x = 8,871,574,446.19/81,441.87
  6. Step 6: Final answer
    x = 108,931.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.