Home / 103,918.08-143,369.28-85,134.72

Finding the Fourth Proportional to 103,918.08, 143,369.28 and 85,134.72

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Solution

The fourth proportional to 103,918.08, 143,369.28 and 85,134.72 is: 117,455.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,918.08 : 143,369.28 = 85,134.72 : x
  2. Step 2: Convert to fraction form
    103,918.08/143,369.28 = 85,134.72/x
  3. Step 3: Cross multiply
    103,918.08x = 143,369.28 × 85,134.72
  4. Step 4: Simplify right side
    103,918.08x = 12,205,703,509.40
  5. Step 5: Solve for x
    x = 12,205,703,509.40/103,918.08
  6. Step 6: Final answer
    x = 117,455.05

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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.