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Finding the Fourth Proportional to 153,922.78, 212,411.36 and 85,940.80

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Solution

The fourth proportional to 153,922.78, 212,411.36 and 85,940.80 is: 118,597.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,922.78 : 212,411.36 = 85,940.80 : x
  2. Step 2: Convert to fraction form
    153,922.78/212,411.36 = 85,940.80/x
  3. Step 3: Cross multiply
    153,922.78x = 212,411.36 × 85,940.80
  4. Step 4: Simplify right side
    153,922.78x = 18,254,801,145.43
  5. Step 5: Solve for x
    x = 18,254,801,145.43/153,922.78
  6. Step 6: Final answer
    x = 118,597.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.