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Finding the Fourth Proportional to 112,643.52, 155,282.40 and 85,739.16

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Solution

The fourth proportional to 112,643.52, 155,282.40 and 85,739.16 is: 118,193.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,643.52 : 155,282.40 = 85,739.16 : x
  2. Step 2: Convert to fraction form
    112,643.52/155,282.40 = 85,739.16/x
  3. Step 3: Cross multiply
    112,643.52x = 155,282.40 × 85,739.16
  4. Step 4: Simplify right side
    112,643.52x = 13,313,782,538.78
  5. Step 5: Solve for x
    x = 13,313,782,538.78/112,643.52
  6. Step 6: Final answer
    x = 118,193.95

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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.