Home / 85,822.60-128,733.90-72,862.60

Finding the Fourth Proportional to 85,822.60, 128,733.90 and 72,862.60

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Solution

The fourth proportional to 85,822.60, 128,733.90 and 72,862.60 is: 109,293.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,822.60 : 128,733.90 = 72,862.60 : x
  2. Step 2: Convert to fraction form
    85,822.60/128,733.90 = 72,862.60/x
  3. Step 3: Cross multiply
    85,822.60x = 128,733.90 × 72,862.60
  4. Step 4: Simplify right side
    85,822.60x = 9,379,886,662.14
  5. Step 5: Solve for x
    x = 9,379,886,662.14/85,822.60
  6. Step 6: Final answer
    x = 109,293.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.