Home / 109,543.10-164,314.65-72,145.40

Finding the Fourth Proportional to 109,543.10, 164,314.65 and 72,145.40

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Solution

The fourth proportional to 109,543.10, 164,314.65 and 72,145.40 is: 108,218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,543.10 : 164,314.65 = 72,145.40 : x
  2. Step 2: Convert to fraction form
    109,543.10/164,314.65 = 72,145.40/x
  3. Step 3: Cross multiply
    109,543.10x = 164,314.65 × 72,145.40
  4. Step 4: Simplify right side
    109,543.10x = 11,854,546,150.11
  5. Step 5: Solve for x
    x = 11,854,546,150.11/109,543.10
  6. Step 6: Final answer
    x = 108,218.10

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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.