Home / 143,312.40-214,968.60-90,781.20

Finding the Fourth Proportional to 143,312.40, 214,968.60 and 90,781.20

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Solution

The fourth proportional to 143,312.40, 214,968.60 and 90,781.20 is: 136,171.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,312.40 : 214,968.60 = 90,781.20 : x
  2. Step 2: Convert to fraction form
    143,312.40/214,968.60 = 90,781.20/x
  3. Step 3: Cross multiply
    143,312.40x = 214,968.60 × 90,781.20
  4. Step 4: Simplify right side
    143,312.40x = 19,515,107,470.32
  5. Step 5: Solve for x
    x = 19,515,107,470.32/143,312.40
  6. Step 6: Final answer
    x = 136,171.80

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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.