Home / 78,140.48-117,210.42-28,220.54

Finding the Fourth Proportional to 78,140.48, 117,210.42 and 28,220.54

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Solution

The fourth proportional to 78,140.48, 117,210.42 and 28,220.54 is: 42,330.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,140.48 : 117,210.42 = 28,220.54 : x
  2. Step 2: Convert to fraction form
    78,140.48/117,210.42 = 28,220.54/x
  3. Step 3: Cross multiply
    78,140.48x = 117,210.42 × 28,220.54
  4. Step 4: Simplify right side
    78,140.48x = 3,307,740,759.97
  5. Step 5: Solve for x
    x = 3,307,740,759.97/78,140.48
  6. Step 6: Final answer
    x = 42,330.70

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1.5x scale

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.