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Finding the Fourth Proportional to 210,740.06, 316,110.40 and 86,081.06

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Solution

The fourth proportional to 210,740.06, 316,110.40 and 86,081.06 is: 129,121.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,740.06 : 316,110.40 = 86,081.06 : x
  2. Step 2: Convert to fraction form
    210,740.06/316,110.40 = 86,081.06/x
  3. Step 3: Cross multiply
    210,740.06x = 316,110.40 × 86,081.06
  4. Step 4: Simplify right side
    210,740.06x = 27,211,118,884.10
  5. Step 5: Solve for x
    x = 27,211,118,884.10/210,740.06
  6. Step 6: Final answer
    x = 129,121.72

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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.