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Finding the Fourth Proportional to 124,782.30, 187,173.45 and 102,620.70

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Solution

The fourth proportional to 124,782.30, 187,173.45 and 102,620.70 is: 153,931.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,782.30 : 187,173.45 = 102,620.70 : x
  2. Step 2: Convert to fraction form
    124,782.30/187,173.45 = 102,620.70/x
  3. Step 3: Cross multiply
    124,782.30x = 187,173.45 × 102,620.70
  4. Step 4: Simplify right side
    124,782.30x = 19,207,870,460.42
  5. Step 5: Solve for x
    x = 19,207,870,460.42/124,782.30
  6. Step 6: Final answer
    x = 153,931.05

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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.