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Finding the Fourth Proportional to 213,192.54, 319,989.74 and 156,860.89

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Solution

The fourth proportional to 213,192.54, 319,989.74 and 156,860.89 is: 235,439.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,192.54 : 319,989.74 = 156,860.89 : x
  2. Step 2: Convert to fraction form
    213,192.54/319,989.74 = 156,860.89/x
  3. Step 3: Cross multiply
    213,192.54x = 319,989.74 × 156,860.89
  4. Step 4: Simplify right side
    213,192.54x = 50,193,875,407.27
  5. Step 5: Solve for x
    x = 50,193,875,407.27/213,192.54
  6. Step 6: Final answer
    x = 235,439.17

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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.