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Finding the Fourth Proportional to 158,543.76, 218,790.12 and 86,926.32

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Solution

The fourth proportional to 158,543.76, 218,790.12 and 86,926.32 is: 119,958.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,543.76 : 218,790.12 = 86,926.32 : x
  2. Step 2: Convert to fraction form
    158,543.76/218,790.12 = 86,926.32/x
  3. Step 3: Cross multiply
    158,543.76x = 218,790.12 × 86,926.32
  4. Step 4: Simplify right side
    158,543.76x = 19,018,619,983.96
  5. Step 5: Solve for x
    x = 19,018,619,983.96/158,543.76
  6. Step 6: Final answer
    x = 119,958.17

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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.