Home / 112,969.12-155,898.96-61,980.90

Finding the Fourth Proportional to 112,969.12, 155,898.96 and 61,980.90

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Solution

The fourth proportional to 112,969.12, 155,898.96 and 61,980.90 is: 85,534.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,969.12 : 155,898.96 = 61,980.90 : x
  2. Step 2: Convert to fraction form
    112,969.12/155,898.96 = 61,980.90/x
  3. Step 3: Cross multiply
    112,969.12x = 155,898.96 × 61,980.90
  4. Step 4: Simplify right side
    112,969.12x = 9,662,757,849.86
  5. Step 5: Solve for x
    x = 9,662,757,849.86/112,969.12
  6. Step 6: Final answer
    x = 85,534.51

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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.