Home / 78,890.40-118,320.96-31,501.44

Finding the Fourth Proportional to 78,890.40, 118,320.96 and 31,501.44

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Solution

The fourth proportional to 78,890.40, 118,320.96 and 31,501.44 is: 47,246.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,890.40 : 118,320.96 = 31,501.44 : x
  2. Step 2: Convert to fraction form
    78,890.40/118,320.96 = 31,501.44/x
  3. Step 3: Cross multiply
    78,890.40x = 118,320.96 × 31,501.44
  4. Step 4: Simplify right side
    78,890.40x = 3,727,280,622.18
  5. Step 5: Solve for x
    x = 3,727,280,622.18/78,890.40
  6. Step 6: Final answer
    x = 47,246.31

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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.