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Finding the Fourth Proportional to 85,603.34, 128,335.40 and 35,720.58

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Solution

The fourth proportional to 85,603.34, 128,335.40 and 35,720.58 is: 53,551.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603.34 : 128,335.40 = 35,720.58 : x
  2. Step 2: Convert to fraction form
    85,603.34/128,335.40 = 35,720.58/x
  3. Step 3: Cross multiply
    85,603.34x = 128,335.40 × 35,720.58
  4. Step 4: Simplify right side
    85,603.34x = 4,584,214,922.53
  5. Step 5: Solve for x
    x = 4,584,214,922.53/85,603.34
  6. Step 6: Final answer
    x = 53,551.82

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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.