Home / 109,826.10-164,739.15-72,428.40

Finding the Fourth Proportional to 109,826.10, 164,739.15 and 72,428.40

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Solution

The fourth proportional to 109,826.10, 164,739.15 and 72,428.40 is: 108,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,826.10 : 164,739.15 = 72,428.40 : x
  2. Step 2: Convert to fraction form
    109,826.10/164,739.15 = 72,428.40/x
  3. Step 3: Cross multiply
    109,826.10x = 164,739.15 × 72,428.40
  4. Step 4: Simplify right side
    109,826.10x = 11,931,793,051.86
  5. Step 5: Solve for x
    x = 11,931,793,051.86/109,826.10
  6. Step 6: Final answer
    x = 108,642.60

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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.