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Finding the Fourth Proportional to 210,613.83, 315,920.79 and 70,372.47

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Solution

The fourth proportional to 210,613.83, 315,920.79 and 70,372.47 is: 105,558.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,613.83 : 315,920.79 = 70,372.47 : x
  2. Step 2: Convert to fraction form
    210,613.83/315,920.79 = 70,372.47/x
  3. Step 3: Cross multiply
    210,613.83x = 315,920.79 × 70,372.47
  4. Step 4: Simplify right side
    210,613.83x = 22,232,126,316.65
  5. Step 5: Solve for x
    x = 22,232,126,316.65/210,613.83
  6. Step 6: Final answer
    x = 105,558.72

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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.