Home / 109,130.20-163,541.70-80,829.40

Finding the Fourth Proportional to 109,130.20, 163,541.70 and 80,829.40

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Solution

The fourth proportional to 109,130.20, 163,541.70 and 80,829.40 is: 121,130.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,130.20 : 163,541.70 = 80,829.40 : x
  2. Step 2: Convert to fraction form
    109,130.20/163,541.70 = 80,829.40/x
  3. Step 3: Cross multiply
    109,130.20x = 163,541.70 × 80,829.40
  4. Step 4: Simplify right side
    109,130.20x = 13,218,977,485.98
  5. Step 5: Solve for x
    x = 13,218,977,485.98/109,130.20
  6. Step 6: Final answer
    x = 121,130.33

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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.