Home / 78,815.55-118,223.33-72,364.35

Finding the Fourth Proportional to 78,815.55, 118,223.33 and 72,364.35

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Solution

The fourth proportional to 78,815.55, 118,223.33 and 72,364.35 is: 108,546.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,815.55 : 118,223.33 = 72,364.35 : x
  2. Step 2: Convert to fraction form
    78,815.55/118,223.33 = 72,364.35/x
  3. Step 3: Cross multiply
    78,815.55x = 118,223.33 × 72,364.35
  4. Step 4: Simplify right side
    78,815.55x = 8,555,154,068.46
  5. Step 5: Solve for x
    x = 8,555,154,068.46/78,815.55
  6. Step 6: Final answer
    x = 108,546.53

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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.