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Finding the Fourth Proportional to 139,374.63, 192,239.01 and 85,689.18

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Solution

The fourth proportional to 139,374.63, 192,239.01 and 85,689.18 is: 118,190.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,374.63 : 192,239.01 = 85,689.18 : x
  2. Step 2: Convert to fraction form
    139,374.63/192,239.01 = 85,689.18/x
  3. Step 3: Cross multiply
    139,374.63x = 192,239.01 × 85,689.18
  4. Step 4: Simplify right side
    139,374.63x = 16,472,803,130.91
  5. Step 5: Solve for x
    x = 16,472,803,130.91/139,374.63
  6. Step 6: Final answer
    x = 118,190.83

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1.5x scale

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.