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Finding the Fourth Proportional to 151,055.66, 208,467 and 99,980.41

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Solution

The fourth proportional to 151,055.66, 208,467 and 99,980.41 is: 137,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,055.66 : 208,467 = 99,980.41 : x
  2. Step 2: Convert to fraction form
    151,055.66/208,467 = 99,980.41/x
  3. Step 3: Cross multiply
    151,055.66x = 208,467 × 99,980.41
  4. Step 4: Simplify right side
    151,055.66x = 20,842,615,089.14
  5. Step 5: Solve for x
    x = 20,842,615,089.14/151,055.66
  6. Step 6: Final answer
    x = 137,979.70

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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.