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Finding the Fourth Proportional to 66,642.84, 91,969.59 and 36,430.21

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Solution

The fourth proportional to 66,642.84, 91,969.59 and 36,430.21 is: 50,275.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,642.84 : 91,969.59 = 36,430.21 : x
  2. Step 2: Convert to fraction form
    66,642.84/91,969.59 = 36,430.21/x
  3. Step 3: Cross multiply
    66,642.84x = 91,969.59 × 36,430.21
  4. Step 4: Simplify right side
    66,642.84x = 3,350,471,477.31
  5. Step 5: Solve for x
    x = 3,350,471,477.31/66,642.84
  6. Step 6: Final answer
    x = 50,275.04

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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.