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Finding the Fourth Proportional to 210,101.32, 315,154.72 and 69,859.94

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Solution

The fourth proportional to 210,101.32, 315,154.72 and 69,859.94 is: 104,790.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,101.32 : 315,154.72 = 69,859.94 : x
  2. Step 2: Convert to fraction form
    210,101.32/315,154.72 = 69,859.94/x
  3. Step 3: Cross multiply
    210,101.32x = 315,154.72 × 69,859.94
  4. Step 4: Simplify right side
    210,101.32x = 22,016,689,829.92
  5. Step 5: Solve for x
    x = 22,016,689,829.92/210,101.32
  6. Step 6: Final answer
    x = 104,790.82

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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.