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Finding the Fourth Proportional to 143,323.40, 214,985.10 and 90,792.20

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Solution

The fourth proportional to 143,323.40, 214,985.10 and 90,792.20 is: 136,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,323.40 : 214,985.10 = 90,792.20 : x
  2. Step 2: Convert to fraction form
    143,323.40/214,985.10 = 90,792.20/x
  3. Step 3: Cross multiply
    143,323.40x = 214,985.10 × 90,792.20
  4. Step 4: Simplify right side
    143,323.40x = 19,518,970,196.22
  5. Step 5: Solve for x
    x = 19,518,970,196.22/143,323.40
  6. Step 6: Final answer
    x = 136,188.30

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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.