Home / 78,765.23-118,155.20-31,368.89

Finding the Fourth Proportional to 78,765.23, 118,155.20 and 31,368.89

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Solution

The fourth proportional to 78,765.23, 118,155.20 and 31,368.89 is: 47,056.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,765.23 : 118,155.20 = 31,368.89 : x
  2. Step 2: Convert to fraction form
    78,765.23/118,155.20 = 31,368.89/x
  3. Step 3: Cross multiply
    78,765.23x = 118,155.20 × 31,368.89
  4. Step 4: Simplify right side
    78,765.23x = 3,706,396,724.11
  5. Step 5: Solve for x
    x = 3,706,396,724.11/78,765.23
  6. Step 6: Final answer
    x = 47,056.26

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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.