Home / 109,649.12-151,307.32-61,907.20

Finding the Fourth Proportional to 109,649.12, 151,307.32 and 61,907.20

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Solution

The fourth proportional to 109,649.12, 151,307.32 and 61,907.20 is: 85,427.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,649.12 : 151,307.32 = 61,907.20 : x
  2. Step 2: Convert to fraction form
    109,649.12/151,307.32 = 61,907.20/x
  3. Step 3: Cross multiply
    109,649.12x = 151,307.32 × 61,907.20
  4. Step 4: Simplify right side
    109,649.12x = 9,367,012,520.70
  5. Step 5: Solve for x
    x = 9,367,012,520.70/109,649.12
  6. Step 6: Final answer
    x = 85,427.16

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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.