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Finding the Fourth Proportional to 210,489.93, 315,737.60 and 70,248.56

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Solution

The fourth proportional to 210,489.93, 315,737.60 and 70,248.56 is: 105,373.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,489.93 : 315,737.60 = 70,248.56 : x
  2. Step 2: Convert to fraction form
    210,489.93/315,737.60 = 70,248.56/x
  3. Step 3: Cross multiply
    210,489.93x = 315,737.60 × 70,248.56
  4. Step 4: Simplify right side
    210,489.93x = 22,180,109,807.93
  5. Step 5: Solve for x
    x = 22,180,109,807.93/210,489.93
  6. Step 6: Final answer
    x = 105,373.73

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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.