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Finding the Fourth Proportional to 153,922.91, 212,411.53 and 85,940.92

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Solution

The fourth proportional to 153,922.91, 212,411.53 and 85,940.92 is: 118,597.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,922.91 : 212,411.53 = 85,940.92 : x
  2. Step 2: Convert to fraction form
    153,922.91/212,411.53 = 85,940.92/x
  3. Step 3: Cross multiply
    153,922.91x = 212,411.53 × 85,940.92
  4. Step 4: Simplify right side
    153,922.91x = 18,254,841,560.93
  5. Step 5: Solve for x
    x = 18,254,841,560.93/153,922.91
  6. Step 6: Final answer
    x = 118,597.30

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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.