Home / 85,403.10-128,116.80-26,229.90

Finding the Fourth Proportional to 85,403.10, 128,116.80 and 26,229.90

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Solution

The fourth proportional to 85,403.10, 128,116.80 and 26,229.90 is: 39,348.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.10 : 128,116.80 = 26,229.90 : x
  2. Step 2: Convert to fraction form
    85,403.10/128,116.80 = 26,229.90/x
  3. Step 3: Cross multiply
    85,403.10x = 128,116.80 × 26,229.90
  4. Step 4: Simplify right side
    85,403.10x = 3,360,490,852.32
  5. Step 5: Solve for x
    x = 3,360,490,852.32/85,403.10
  6. Step 6: Final answer
    x = 39,348.58

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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.