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Finding the Fourth Proportional to 210,740.68, 316,111.34 and 86,081.68

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Solution

The fourth proportional to 210,740.68, 316,111.34 and 86,081.68 is: 129,122.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,740.68 : 316,111.34 = 86,081.68 : x
  2. Step 2: Convert to fraction form
    210,740.68/316,111.34 = 86,081.68/x
  3. Step 3: Cross multiply
    210,740.68x = 316,111.34 × 86,081.68
  4. Step 4: Simplify right side
    210,740.68x = 27,211,395,214.25
  5. Step 5: Solve for x
    x = 27,211,395,214.25/210,740.68
  6. Step 6: Final answer
    x = 129,122.65

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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.