Home / 85,827.40-128,756.02-28,895.90

Finding the Fourth Proportional to 85,827.40, 128,756.02 and 28,895.90

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Solution

The fourth proportional to 85,827.40, 128,756.02 and 28,895.90 is: 43,348.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,827.40 : 128,756.02 = 28,895.90 : x
  2. Step 2: Convert to fraction form
    85,827.40/128,756.02 = 28,895.90/x
  3. Step 3: Cross multiply
    85,827.40x = 128,756.02 × 28,895.90
  4. Step 4: Simplify right side
    85,827.40x = 3,720,521,078.32
  5. Step 5: Solve for x
    x = 3,720,521,078.32/85,827.40
  6. Step 6: Final answer
    x = 43,348.87

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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.