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Finding the Fourth Proportional to 158,490.45, 237,946.85 and 91,978.32

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Solution

The fourth proportional to 158,490.45, 237,946.85 and 91,978.32 is: 138,090.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,490.45 : 237,946.85 = 91,978.32 : x
  2. Step 2: Convert to fraction form
    158,490.45/237,946.85 = 91,978.32/x
  3. Step 3: Cross multiply
    158,490.45x = 237,946.85 × 91,978.32
  4. Step 4: Simplify right side
    158,490.45x = 21,885,951,052.40
  5. Step 5: Solve for x
    x = 21,885,951,052.40/158,490.45
  6. Step 6: Final answer
    x = 138,090.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.