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Finding the Fourth Proportional to 158,658.02, 218,967.47 and 90,659.40

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Solution

The fourth proportional to 158,658.02, 218,967.47 and 90,659.40 is: 125,121.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,658.02 : 218,967.47 = 90,659.40 : x
  2. Step 2: Convert to fraction form
    158,658.02/218,967.47 = 90,659.40/x
  3. Step 3: Cross multiply
    158,658.02x = 218,967.47 × 90,659.40
  4. Step 4: Simplify right side
    158,658.02x = 19,851,458,515.27
  5. Step 5: Solve for x
    x = 19,851,458,515.27/158,658.02
  6. Step 6: Final answer
    x = 125,121.05

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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.