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Finding the Fourth Proportional to 145,745.10, 201,128.82 and 85,303.94

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Solution

The fourth proportional to 145,745.10, 201,128.82 and 85,303.94 is: 117,719.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,745.10 : 201,128.82 = 85,303.94 : x
  2. Step 2: Convert to fraction form
    145,745.10/201,128.82 = 85,303.94/x
  3. Step 3: Cross multiply
    145,745.10x = 201,128.82 × 85,303.94
  4. Step 4: Simplify right side
    145,745.10x = 17,157,079,947.85
  5. Step 5: Solve for x
    x = 17,157,079,947.85/145,745.10
  6. Step 6: Final answer
    x = 117,719.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.