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Finding the Fourth Proportional to 112,645.52, 155,285.16 and 85,741.16

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Solution

The fourth proportional to 112,645.52, 155,285.16 and 85,741.16 is: 118,196.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,645.52 : 155,285.16 = 85,741.16 : x
  2. Step 2: Convert to fraction form
    112,645.52/155,285.16 = 85,741.16/x
  3. Step 3: Cross multiply
    112,645.52x = 155,285.16 × 85,741.16
  4. Step 4: Simplify right side
    112,645.52x = 13,314,329,749.19
  5. Step 5: Solve for x
    x = 13,314,329,749.19/112,645.52
  6. Step 6: Final answer
    x = 118,196.71

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1.5x scale

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.