Home / 66,138.51-91,271.34-39,282.15

Finding the Fourth Proportional to 66,138.51, 91,271.34 and 39,282.15

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Solution

The fourth proportional to 66,138.51, 91,271.34 and 39,282.15 is: 54,209.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,138.51 : 91,271.34 = 39,282.15 : x
  2. Step 2: Convert to fraction form
    66,138.51/91,271.34 = 39,282.15/x
  3. Step 3: Cross multiply
    66,138.51x = 91,271.34 × 39,282.15
  4. Step 4: Simplify right side
    66,138.51x = 3,585,334,468.58
  5. Step 5: Solve for x
    x = 3,585,334,468.58/66,138.51
  6. Step 6: Final answer
    x = 54,209.48

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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.