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Finding the Fourth Proportional to 112,783.68, 155,648 and 61,796.50

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Solution

The fourth proportional to 112,783.68, 155,648 and 61,796.50 is: 85,282.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,783.68 : 155,648 = 61,796.50 : x
  2. Step 2: Convert to fraction form
    112,783.68/155,648 = 61,796.50/x
  3. Step 3: Cross multiply
    112,783.68x = 155,648 × 61,796.50
  4. Step 4: Simplify right side
    112,783.68x = 9,618,501,632
  5. Step 5: Solve for x
    x = 9,618,501,632/112,783.68
  6. Step 6: Final answer
    x = 85,282.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.