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Finding the Fourth Proportional to 210,279.68, 315,341.64 and 75,322.72

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Solution

The fourth proportional to 210,279.68, 315,341.64 and 75,322.72 is: 112,956.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,279.68 : 315,341.64 = 75,322.72 : x
  2. Step 2: Convert to fraction form
    210,279.68/315,341.64 = 75,322.72/x
  3. Step 3: Cross multiply
    210,279.68x = 315,341.64 × 75,322.72
  4. Step 4: Simplify right side
    210,279.68x = 23,752,390,054.06
  5. Step 5: Solve for x
    x = 23,752,390,054.06/210,279.68
  6. Step 6: Final answer
    x = 112,956.18

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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.