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Finding the Fourth Proportional to 210,697.62, 315,980.55 and 70,423.44

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Solution

The fourth proportional to 210,697.62, 315,980.55 and 70,423.44 is: 105,613.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,697.62 : 315,980.55 = 70,423.44 : x
  2. Step 2: Convert to fraction form
    210,697.62/315,980.55 = 70,423.44/x
  3. Step 3: Cross multiply
    210,697.62x = 315,980.55 × 70,423.44
  4. Step 4: Simplify right side
    210,697.62x = 22,252,437,304.09
  5. Step 5: Solve for x
    x = 22,252,437,304.09/210,697.62
  6. Step 6: Final answer
    x = 105,613.14

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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.