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Finding the Fourth Proportional to 112,276, 154,941.15 and 61,975

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Solution

The fourth proportional to 112,276, 154,941.15 and 61,975 is: 85,525.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,276 : 154,941.15 = 61,975 : x
  2. Step 2: Convert to fraction form
    112,276/154,941.15 = 61,975/x
  3. Step 3: Cross multiply
    112,276x = 154,941.15 × 61,975
  4. Step 4: Simplify right side
    112,276x = 9,602,477,771.25
  5. Step 5: Solve for x
    x = 9,602,477,771.25/112,276
  6. Step 6: Final answer
    x = 85,525.65

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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.