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Finding the Fourth Proportional to 158,339.88, 218,509.11 and 86,724.41

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Solution

The fourth proportional to 158,339.88, 218,509.11 and 86,724.41 is: 119,679.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,339.88 : 218,509.11 = 86,724.41 : x
  2. Step 2: Convert to fraction form
    158,339.88/218,509.11 = 86,724.41/x
  3. Step 3: Cross multiply
    158,339.88x = 218,509.11 × 86,724.41
  4. Step 4: Simplify right side
    158,339.88x = 18,950,072,551.83
  5. Step 5: Solve for x
    x = 18,950,072,551.83/158,339.88
  6. Step 6: Final answer
    x = 119,679.72

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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.