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Finding the Fourth Proportional to 126,703.20, 190,054.80 and 56,719.20

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Solution

The fourth proportional to 126,703.20, 190,054.80 and 56,719.20 is: 85,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,703.20 : 190,054.80 = 56,719.20 : x
  2. Step 2: Convert to fraction form
    126,703.20/190,054.80 = 56,719.20/x
  3. Step 3: Cross multiply
    126,703.20x = 190,054.80 × 56,719.20
  4. Step 4: Simplify right side
    126,703.20x = 10,779,756,212.16
  5. Step 5: Solve for x
    x = 10,779,756,212.16/126,703.20
  6. Step 6: Final answer
    x = 85,078.80

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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.