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Finding the Fourth Proportional to 207,915.48, 286,923.30 and 112,422.20

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Solution

The fourth proportional to 207,915.48, 286,923.30 and 112,422.20 is: 155,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,915.48 : 286,923.30 = 112,422.20 : x
  2. Step 2: Convert to fraction form
    207,915.48/286,923.30 = 112,422.20/x
  3. Step 3: Cross multiply
    207,915.48x = 286,923.30 × 112,422.20
  4. Step 4: Simplify right side
    207,915.48x = 32,256,548,617.26
  5. Step 5: Solve for x
    x = 32,256,548,617.26/207,915.48
  6. Step 6: Final answer
    x = 155,142.60

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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.