Home / 85,790.12-128,702.34-29,632.28

Finding the Fourth Proportional to 85,790.12, 128,702.34 and 29,632.28

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Solution

The fourth proportional to 85,790.12, 128,702.34 and 29,632.28 is: 44,454.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,790.12 : 128,702.34 = 29,632.28 : x
  2. Step 2: Convert to fraction form
    85,790.12/128,702.34 = 29,632.28/x
  3. Step 3: Cross multiply
    85,790.12x = 128,702.34 × 29,632.28
  4. Step 4: Simplify right side
    85,790.12x = 3,813,743,132.02
  5. Step 5: Solve for x
    x = 3,813,743,132.02/85,790.12
  6. Step 6: Final answer
    x = 44,454.34

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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.