Home / 109,343.20-164,014.80-72,018.40

Finding the Fourth Proportional to 109,343.20, 164,014.80 and 72,018.40

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Solution

The fourth proportional to 109,343.20, 164,014.80 and 72,018.40 is: 108,027.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,343.20 : 164,014.80 = 72,018.40 : x
  2. Step 2: Convert to fraction form
    109,343.20/164,014.80 = 72,018.40/x
  3. Step 3: Cross multiply
    109,343.20x = 164,014.80 × 72,018.40
  4. Step 4: Simplify right side
    109,343.20x = 11,812,083,472.32
  5. Step 5: Solve for x
    x = 11,812,083,472.32/109,343.20
  6. Step 6: Final answer
    x = 108,027.60

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1.5x scale

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.