Home / 85,826.95-128,718.87-40,820.53

Finding the Fourth Proportional to 85,826.95, 128,718.87 and 40,820.53

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Solution

The fourth proportional to 85,826.95, 128,718.87 and 40,820.53 is: 61,220.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,826.95 : 128,718.87 = 40,820.53 : x
  2. Step 2: Convert to fraction form
    85,826.95/128,718.87 = 40,820.53/x
  3. Step 3: Cross multiply
    85,826.95x = 128,718.87 × 40,820.53
  4. Step 4: Simplify right side
    85,826.95x = 5,254,372,494.40
  5. Step 5: Solve for x
    x = 5,254,372,494.40/85,826.95
  6. Step 6: Final answer
    x = 61,220.54

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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.