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Finding the Fourth Proportional to 252,885.68, 348,989.28 and 139,715.72

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Solution

The fourth proportional to 252,885.68, 348,989.28 and 139,715.72 is: 192,811.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,885.68 : 348,989.28 = 139,715.72 : x
  2. Step 2: Convert to fraction form
    252,885.68/348,989.28 = 139,715.72/x
  3. Step 3: Cross multiply
    252,885.68x = 348,989.28 × 139,715.72
  4. Step 4: Simplify right side
    252,885.68x = 48,759,288,527.48
  5. Step 5: Solve for x
    x = 48,759,288,527.48/252,885.68
  6. Step 6: Final answer
    x = 192,811.58

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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.