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Finding the Fourth Proportional to 124,701.20, 187,051.80 and 31,206.80

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Solution

The fourth proportional to 124,701.20, 187,051.80 and 31,206.80 is: 46,810.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,701.20 : 187,051.80 = 31,206.80 : x
  2. Step 2: Convert to fraction form
    124,701.20/187,051.80 = 31,206.80/x
  3. Step 3: Cross multiply
    124,701.20x = 187,051.80 × 31,206.80
  4. Step 4: Simplify right side
    124,701.20x = 5,837,288,112.24
  5. Step 5: Solve for x
    x = 5,837,288,112.24/124,701.20
  6. Step 6: Final answer
    x = 46,810.20

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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.