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Finding the Fourth Proportional to 128,439.52, 192,577.22 and 61,746.94

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Solution

The fourth proportional to 128,439.52, 192,577.22 and 61,746.94 is: 92,580.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,439.52 : 192,577.22 = 61,746.94 : x
  2. Step 2: Convert to fraction form
    128,439.52/192,577.22 = 61,746.94/x
  3. Step 3: Cross multiply
    128,439.52x = 192,577.22 × 61,746.94
  4. Step 4: Simplify right side
    128,439.52x = 11,891,054,048.71
  5. Step 5: Solve for x
    x = 11,891,054,048.71/128,439.52
  6. Step 6: Final answer
    x = 92,580.96

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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.