Home / 128,125.37-192,123.54-42,705.98

Finding the Fourth Proportional to 128,125.37, 192,123.54 and 42,705.98

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Solution

The fourth proportional to 128,125.37, 192,123.54 and 42,705.98 is: 64,037.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,125.37 : 192,123.54 = 42,705.98 : x
  2. Step 2: Convert to fraction form
    128,125.37/192,123.54 = 42,705.98/x
  3. Step 3: Cross multiply
    128,125.37x = 192,123.54 × 42,705.98
  4. Step 4: Simplify right side
    128,125.37x = 8,204,823,816.61
  5. Step 5: Solve for x
    x = 8,204,823,816.61/128,125.37
  6. Step 6: Final answer
    x = 64,037.46

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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.