Home / 142,742.40-214,113.60-76,387.20

Finding the Fourth Proportional to 142,742.40, 214,113.60 and 76,387.20

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Solution

The fourth proportional to 142,742.40, 214,113.60 and 76,387.20 is: 114,580.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,742.40 : 214,113.60 = 76,387.20 : x
  2. Step 2: Convert to fraction form
    142,742.40/214,113.60 = 76,387.20/x
  3. Step 3: Cross multiply
    142,742.40x = 214,113.60 × 76,387.20
  4. Step 4: Simplify right side
    142,742.40x = 16,355,538,385.92
  5. Step 5: Solve for x
    x = 16,355,538,385.92/142,742.40
  6. Step 6: Final answer
    x = 114,580.80

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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.