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Finding the Fourth Proportional to 253,868, 350,341.68 and 139,145.72

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Solution

The fourth proportional to 253,868, 350,341.68 and 139,145.72 is: 192,023.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,868 : 350,341.68 = 139,145.72 : x
  2. Step 2: Convert to fraction form
    253,868/350,341.68 = 139,145.72/x
  3. Step 3: Cross multiply
    253,868x = 350,341.68 × 139,145.72
  4. Step 4: Simplify right side
    253,868x = 48,748,545,309.61
  5. Step 5: Solve for x
    x = 48,748,545,309.61/253,868
  6. Step 6: Final answer
    x = 192,023.20

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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.