Home / 112,847.64-155,779.35-78,989.10

Finding the Fourth Proportional to 112,847.64, 155,779.35 and 78,989.10

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Solution

The fourth proportional to 112,847.64, 155,779.35 and 78,989.10 is: 109,039.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,847.64 : 155,779.35 = 78,989.10 : x
  2. Step 2: Convert to fraction form
    112,847.64/155,779.35 = 78,989.10/x
  3. Step 3: Cross multiply
    112,847.64x = 155,779.35 × 78,989.10
  4. Step 4: Simplify right side
    112,847.64x = 12,304,870,655.09
  5. Step 5: Solve for x
    x = 12,304,870,655.09/112,847.64
  6. Step 6: Final answer
    x = 109,039.68

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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.