Home / 78,847.20-118,117.60-70,011.72

Finding the Fourth Proportional to 78,847.20, 118,117.60 and 70,011.72

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Solution

The fourth proportional to 78,847.20, 118,117.60 and 70,011.72 is: 104,881.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,847.20 : 118,117.60 = 70,011.72 : x
  2. Step 2: Convert to fraction form
    78,847.20/118,117.60 = 70,011.72/x
  3. Step 3: Cross multiply
    78,847.20x = 118,117.60 × 70,011.72
  4. Step 4: Simplify right side
    78,847.20x = 8,269,616,338.27
  5. Step 5: Solve for x
    x = 8,269,616,338.27/78,847.20
  6. Step 6: Final answer
    x = 104,881.55

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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.