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Finding the Fourth Proportional to 157,071.72, 216,661.78 and 136,976.84

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Solution

The fourth proportional to 157,071.72, 216,661.78 and 136,976.84 is: 188,943.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,071.72 : 216,661.78 = 136,976.84 : x
  2. Step 2: Convert to fraction form
    157,071.72/216,661.78 = 136,976.84/x
  3. Step 3: Cross multiply
    157,071.72x = 216,661.78 × 136,976.84
  4. Step 4: Simplify right side
    157,071.72x = 29,677,645,973.18
  5. Step 5: Solve for x
    x = 29,677,645,973.18/157,071.72
  6. Step 6: Final answer
    x = 188,943.28

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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.