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Finding the Fourth Proportional to 127,643.80, 191,485.96 and 38,876.72

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Solution

The fourth proportional to 127,643.80, 191,485.96 and 38,876.72 is: 58,321.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,643.80 : 191,485.96 = 38,876.72 : x
  2. Step 2: Convert to fraction form
    127,643.80/191,485.96 = 38,876.72/x
  3. Step 3: Cross multiply
    127,643.80x = 191,485.96 × 38,876.72
  4. Step 4: Simplify right side
    127,643.80x = 7,444,346,050.85
  5. Step 5: Solve for x
    x = 7,444,346,050.85/127,643.80
  6. Step 6: Final answer
    x = 58,321.25

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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.