Home / 85,410.12-128,102.04-28,485.02

Finding the Fourth Proportional to 85,410.12, 128,102.04 and 28,485.02

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Solution

The fourth proportional to 85,410.12, 128,102.04 and 28,485.02 is: 42,723.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,410.12 : 128,102.04 = 28,485.02 : x
  2. Step 2: Convert to fraction form
    85,410.12/128,102.04 = 28,485.02/x
  3. Step 3: Cross multiply
    85,410.12x = 128,102.04 × 28,485.02
  4. Step 4: Simplify right side
    85,410.12x = 3,648,989,411.58
  5. Step 5: Solve for x
    x = 3,648,989,411.58/85,410.12
  6. Step 6: Final answer
    x = 42,723.15

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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.