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Finding the Fourth Proportional to 120,615.40, 180,923.10 and 89,511.40

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Solution

The fourth proportional to 120,615.40, 180,923.10 and 89,511.40 is: 134,267.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,615.40 : 180,923.10 = 89,511.40 : x
  2. Step 2: Convert to fraction form
    120,615.40/180,923.10 = 89,511.40/x
  3. Step 3: Cross multiply
    120,615.40x = 180,923.10 × 89,511.40
  4. Step 4: Simplify right side
    120,615.40x = 16,194,679,973.34
  5. Step 5: Solve for x
    x = 16,194,679,973.34/120,615.40
  6. Step 6: Final answer
    x = 134,267.10

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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.