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Finding the Fourth Proportional to 128,123.70, 192,203.93 and 39,384.66

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Solution

The fourth proportional to 128,123.70, 192,203.93 and 39,384.66 is: 59,082.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,123.70 : 192,203.93 = 39,384.66 : x
  2. Step 2: Convert to fraction form
    128,123.70/192,203.93 = 39,384.66/x
  3. Step 3: Cross multiply
    128,123.70x = 192,203.93 × 39,384.66
  4. Step 4: Simplify right side
    128,123.70x = 7,569,886,532.18
  5. Step 5: Solve for x
    x = 7,569,886,532.18/128,123.70
  6. Step 6: Final answer
    x = 59,082.64

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1.5x scale

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.