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Finding the Fourth Proportional to 318,765.52, 478,211.37 and 91,063.10

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Solution

The fourth proportional to 318,765.52, 478,211.37 and 91,063.10 is: 136,612.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,765.52 : 478,211.37 = 91,063.10 : x
  2. Step 2: Convert to fraction form
    318,765.52/478,211.37 = 91,063.10/x
  3. Step 3: Cross multiply
    318,765.52x = 478,211.37 × 91,063.10
  4. Step 4: Simplify right side
    318,765.52x = 43,547,408,483.78
  5. Step 5: Solve for x
    x = 43,547,408,483.78/318,765.52
  6. Step 6: Final answer
    x = 136,612.67

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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.