Home / 78,185.34-117,197.43-30,781.20

Finding the Fourth Proportional to 78,185.34, 117,197.43 and 30,781.20

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Solution

The fourth proportional to 78,185.34, 117,197.43 and 30,781.20 is: 46,140.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,185.34 : 117,197.43 = 30,781.20 : x
  2. Step 2: Convert to fraction form
    78,185.34/117,197.43 = 30,781.20/x
  3. Step 3: Cross multiply
    78,185.34x = 117,197.43 × 30,781.20
  4. Step 4: Simplify right side
    78,185.34x = 3,607,477,864.71
  5. Step 5: Solve for x
    x = 3,607,477,864.71/78,185.34
  6. Step 6: Final answer
    x = 46,140.08

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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.