Home / 156,678.40-235,171.20-77,881.60

Finding the Fourth Proportional to 156,678.40, 235,171.20 and 77,881.60

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Solution

The fourth proportional to 156,678.40, 235,171.20 and 77,881.60 is: 116,898.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,678.40 : 235,171.20 = 77,881.60 : x
  2. Step 2: Convert to fraction form
    156,678.40/235,171.20 = 77,881.60/x
  3. Step 3: Cross multiply
    156,678.40x = 235,171.20 × 77,881.60
  4. Step 4: Simplify right side
    156,678.40x = 18,315,509,329.92
  5. Step 5: Solve for x
    x = 18,315,509,329.92/156,678.40
  6. Step 6: Final answer
    x = 116,898.75

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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.