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Finding the Fourth Proportional to 158,005.15, 218,047.31 and 90,019.15

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Solution

The fourth proportional to 158,005.15, 218,047.31 and 90,019.15 is: 124,226.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,005.15 : 218,047.31 = 90,019.15 : x
  2. Step 2: Convert to fraction form
    158,005.15/218,047.31 = 90,019.15/x
  3. Step 3: Cross multiply
    158,005.15x = 218,047.31 × 90,019.15
  4. Step 4: Simplify right side
    158,005.15x = 19,628,432,848.34
  5. Step 5: Solve for x
    x = 19,628,432,848.34/158,005.15
  6. Step 6: Final answer
    x = 124,226.54

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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.