Home / 105,221.20-145,208.40-57,476.80

Finding the Fourth Proportional to 105,221.20, 145,208.40 and 57,476.80

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Solution

The fourth proportional to 105,221.20, 145,208.40 and 57,476.80 is: 79,319.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,221.20 : 145,208.40 = 57,476.80 : x
  2. Step 2: Convert to fraction form
    105,221.20/145,208.40 = 57,476.80/x
  3. Step 3: Cross multiply
    105,221.20x = 145,208.40 × 57,476.80
  4. Step 4: Simplify right side
    105,221.20x = 8,346,114,165.12
  5. Step 5: Solve for x
    x = 8,346,114,165.12/105,221.20
  6. Step 6: Final answer
    x = 79,319.70

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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.