Home / 112,421.75-155,070.68-85,505.24

Finding the Fourth Proportional to 112,421.75, 155,070.68 and 85,505.24

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Solution

The fourth proportional to 112,421.75, 155,070.68 and 85,505.24 is: 117,942.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,421.75 : 155,070.68 = 85,505.24 : x
  2. Step 2: Convert to fraction form
    112,421.75/155,070.68 = 85,505.24/x
  3. Step 3: Cross multiply
    112,421.75x = 155,070.68 × 85,505.24
  4. Step 4: Simplify right side
    112,421.75x = 13,259,355,670.51
  5. Step 5: Solve for x
    x = 13,259,355,670.51/112,421.75
  6. Step 6: Final answer
    x = 117,942.98

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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.