Home / 85,827.95-128,720.37-40,821.53

Finding the Fourth Proportional to 85,827.95, 128,720.37 and 40,821.53

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Solution

The fourth proportional to 85,827.95, 128,720.37 and 40,821.53 is: 61,222.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,827.95 : 128,720.37 = 40,821.53 : x
  2. Step 2: Convert to fraction form
    85,827.95/128,720.37 = 40,821.53/x
  3. Step 3: Cross multiply
    85,827.95x = 128,720.37 × 40,821.53
  4. Step 4: Simplify right side
    85,827.95x = 5,254,562,445.57
  5. Step 5: Solve for x
    x = 5,254,562,445.57/85,827.95
  6. Step 6: Final answer
    x = 61,222.04

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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.