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Finding the Fourth Proportional to 239,438.40, 359,200.80 and 99,211.20

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Solution

The fourth proportional to 239,438.40, 359,200.80 and 99,211.20 is: 148,834.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,438.40 : 359,200.80 = 99,211.20 : x
  2. Step 2: Convert to fraction form
    239,438.40/359,200.80 = 99,211.20/x
  3. Step 3: Cross multiply
    239,438.40x = 359,200.80 × 99,211.20
  4. Step 4: Simplify right side
    239,438.40x = 35,636,742,408.96
  5. Step 5: Solve for x
    x = 35,636,742,408.96/239,438.40
  6. Step 6: Final answer
    x = 148,834.70

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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.