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Finding the Fourth Proportional to 215,672.90, 323,432.55 and 97,400.90

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Solution

The fourth proportional to 215,672.90, 323,432.55 and 97,400.90 is: 146,066.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,672.90 : 323,432.55 = 97,400.90 : x
  2. Step 2: Convert to fraction form
    215,672.90/323,432.55 = 97,400.90/x
  3. Step 3: Cross multiply
    215,672.90x = 323,432.55 × 97,400.90
  4. Step 4: Simplify right side
    215,672.90x = 31,502,621,459.30
  5. Step 5: Solve for x
    x = 31,502,621,459.30/215,672.90
  6. Step 6: Final answer
    x = 146,066.67

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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.