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Finding the Fourth Proportional to 142,145.80, 212,937.90 and 92,260.60

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Solution

The fourth proportional to 142,145.80, 212,937.90 and 92,260.60 is: 138,208.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,145.80 : 212,937.90 = 92,260.60 : x
  2. Step 2: Convert to fraction form
    142,145.80/212,937.90 = 92,260.60/x
  3. Step 3: Cross multiply
    142,145.80x = 212,937.90 × 92,260.60
  4. Step 4: Simplify right side
    142,145.80x = 19,645,778,416.74
  5. Step 5: Solve for x
    x = 19,645,778,416.74/142,145.80
  6. Step 6: Final answer
    x = 138,208.65

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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.