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Finding the Fourth Proportional to 108,933.30, 163,399.95 and 81,285.30

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Solution

The fourth proportional to 108,933.30, 163,399.95 and 81,285.30 is: 121,927.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,933.30 : 163,399.95 = 81,285.30 : x
  2. Step 2: Convert to fraction form
    108,933.30/163,399.95 = 81,285.30/x
  3. Step 3: Cross multiply
    108,933.30x = 163,399.95 × 81,285.30
  4. Step 4: Simplify right side
    108,933.30x = 13,282,013,955.74
  5. Step 5: Solve for x
    x = 13,282,013,955.74/108,933.30
  6. Step 6: Final answer
    x = 121,927.95

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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.