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Finding the Fourth Proportional to 210,117.28, 315,170.16 and 69,878.56

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Solution

The fourth proportional to 210,117.28, 315,170.16 and 69,878.56 is: 104,815.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,117.28 : 315,170.16 = 69,878.56 : x
  2. Step 2: Convert to fraction form
    210,117.28/315,170.16 = 69,878.56/x
  3. Step 3: Cross multiply
    210,117.28x = 315,170.16 × 69,878.56
  4. Step 4: Simplify right side
    210,117.28x = 22,023,636,935.77
  5. Step 5: Solve for x
    x = 22,023,636,935.77/210,117.28
  6. Step 6: Final answer
    x = 104,815.92

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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.