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Finding the Fourth Proportional to 140,937.60, 211,406.40 and 85,641.60

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Solution

The fourth proportional to 140,937.60, 211,406.40 and 85,641.60 is: 128,462.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,937.60 : 211,406.40 = 85,641.60 : x
  2. Step 2: Convert to fraction form
    140,937.60/211,406.40 = 85,641.60/x
  3. Step 3: Cross multiply
    140,937.60x = 211,406.40 × 85,641.60
  4. Step 4: Simplify right side
    140,937.60x = 18,105,182,346.24
  5. Step 5: Solve for x
    x = 18,105,182,346.24/140,937.60
  6. Step 6: Final answer
    x = 128,462.40

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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.