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Finding the Fourth Proportional to 210,009.71, 315,115.92 and 103,335.81

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Solution

The fourth proportional to 210,009.71, 315,115.92 and 103,335.81 is: 155,053.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,009.71 : 315,115.92 = 103,335.81 : x
  2. Step 2: Convert to fraction form
    210,009.71/315,115.92 = 103,335.81/x
  3. Step 3: Cross multiply
    210,009.71x = 315,115.92 × 103,335.81
  4. Step 4: Simplify right side
    210,009.71x = 32,562,758,837.10
  5. Step 5: Solve for x
    x = 32,562,758,837.10/210,009.71
  6. Step 6: Final answer
    x = 155,053.59

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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.