Home / 155,841.63-215,168.18-99,329.55

Finding the Fourth Proportional to 155,841.63, 215,168.18 and 99,329.55

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Solution

The fourth proportional to 155,841.63, 215,168.18 and 99,329.55 is: 137,142.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,841.63 : 215,168.18 = 99,329.55 : x
  2. Step 2: Convert to fraction form
    155,841.63/215,168.18 = 99,329.55/x
  3. Step 3: Cross multiply
    155,841.63x = 215,168.18 × 99,329.55
  4. Step 4: Simplify right side
    155,841.63x = 21,372,557,997.07
  5. Step 5: Solve for x
    x = 21,372,557,997.07/155,841.63
  6. Step 6: Final answer
    x = 137,142.80

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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.