Home / 81,378.75-112,312.26-45,561.84

Finding the Fourth Proportional to 81,378.75, 112,312.26 and 45,561.84

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Solution

The fourth proportional to 81,378.75, 112,312.26 and 45,561.84 is: 62,880.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,378.75 : 112,312.26 = 45,561.84 : x
  2. Step 2: Convert to fraction form
    81,378.75/112,312.26 = 45,561.84/x
  3. Step 3: Cross multiply
    81,378.75x = 112,312.26 × 45,561.84
  4. Step 4: Simplify right side
    81,378.75x = 5,117,153,220.16
  5. Step 5: Solve for x
    x = 5,117,153,220.16/81,378.75
  6. Step 6: Final answer
    x = 62,880.71

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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.