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Finding the Fourth Proportional to 128,457.70, 192,686.55 and 34,963.30

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Solution

The fourth proportional to 128,457.70, 192,686.55 and 34,963.30 is: 52,444.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,457.70 : 192,686.55 = 34,963.30 : x
  2. Step 2: Convert to fraction form
    128,457.70/192,686.55 = 34,963.30/x
  3. Step 3: Cross multiply
    128,457.70x = 192,686.55 × 34,963.30
  4. Step 4: Simplify right side
    128,457.70x = 6,736,957,653.62
  5. Step 5: Solve for x
    x = 6,736,957,653.62/128,457.70
  6. Step 6: Final answer
    x = 52,444.95

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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.