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Finding the Fourth Proportional to 140,939.60, 211,409.40 and 42,430.80

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Solution

The fourth proportional to 140,939.60, 211,409.40 and 42,430.80 is: 63,646.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,939.60 : 211,409.40 = 42,430.80 : x
  2. Step 2: Convert to fraction form
    140,939.60/211,409.40 = 42,430.80/x
  3. Step 3: Cross multiply
    140,939.60x = 211,409.40 × 42,430.80
  4. Step 4: Simplify right side
    140,939.60x = 8,970,269,969.52
  5. Step 5: Solve for x
    x = 8,970,269,969.52/140,939.60
  6. Step 6: Final answer
    x = 63,646.20

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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.