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Finding the Fourth Proportional to 317,680.58, 476,415.15 and 128,091.98

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Solution

The fourth proportional to 317,680.58, 476,415.15 and 128,091.98 is: 192,095.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,680.58 : 476,415.15 = 128,091.98 : x
  2. Step 2: Convert to fraction form
    317,680.58/476,415.15 = 128,091.98/x
  3. Step 3: Cross multiply
    317,680.58x = 476,415.15 × 128,091.98
  4. Step 4: Simplify right side
    317,680.58x = 61,024,957,838.77
  5. Step 5: Solve for x
    x = 61,024,957,838.77/317,680.58
  6. Step 6: Final answer
    x = 192,095.34

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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.