Home / 78,143.54-117,220.57-38,690.06

Finding the Fourth Proportional to 78,143.54, 117,220.57 and 38,690.06

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Solution

The fourth proportional to 78,143.54, 117,220.57 and 38,690.06 is: 58,037.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,143.54 : 117,220.57 = 38,690.06 : x
  2. Step 2: Convert to fraction form
    78,143.54/117,220.57 = 38,690.06/x
  3. Step 3: Cross multiply
    78,143.54x = 117,220.57 × 38,690.06
  4. Step 4: Simplify right side
    78,143.54x = 4,535,270,203.71
  5. Step 5: Solve for x
    x = 4,535,270,203.71/78,143.54
  6. Step 6: Final answer
    x = 58,037.69

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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.