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Finding the Fourth Proportional to 217,421.70, 325,970.55 and 112,316.10

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Solution

The fourth proportional to 217,421.70, 325,970.55 and 112,316.10 is: 168,390.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,421.70 : 325,970.55 = 112,316.10 : x
  2. Step 2: Convert to fraction form
    217,421.70/325,970.55 = 112,316.10/x
  3. Step 3: Cross multiply
    217,421.70x = 325,970.55 × 112,316.10
  4. Step 4: Simplify right side
    217,421.70x = 36,611,740,890.86
  5. Step 5: Solve for x
    x = 36,611,740,890.86/217,421.70
  6. Step 6: Final answer
    x = 168,390.46

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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.