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Finding the Fourth Proportional to 85,355.16, 128,060.14 and 35,459.16

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Solution

The fourth proportional to 85,355.16, 128,060.14 and 35,459.16 is: 53,200.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,355.16 : 128,060.14 = 35,459.16 : x
  2. Step 2: Convert to fraction form
    85,355.16/128,060.14 = 35,459.16/x
  3. Step 3: Cross multiply
    85,355.16x = 128,060.14 × 35,459.16
  4. Step 4: Simplify right side
    85,355.16x = 4,540,904,993.88
  5. Step 5: Solve for x
    x = 4,540,904,993.88/85,355.16
  6. Step 6: Final answer
    x = 53,200.12

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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.