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Finding the Fourth Proportional to 114,643.80, 171,965.70 and 72,653.40

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Solution

The fourth proportional to 114,643.80, 171,965.70 and 72,653.40 is: 108,980.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,643.80 : 171,965.70 = 72,653.40 : x
  2. Step 2: Convert to fraction form
    114,643.80/171,965.70 = 72,653.40/x
  3. Step 3: Cross multiply
    114,643.80x = 171,965.70 × 72,653.40
  4. Step 4: Simplify right side
    114,643.80x = 12,493,892,788.38
  5. Step 5: Solve for x
    x = 12,493,892,788.38/114,643.80
  6. Step 6: Final answer
    x = 108,980.10

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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.