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Finding the Fourth Proportional to 171,913.72, 257,970.98 and 72,066.24

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Solution

The fourth proportional to 171,913.72, 257,970.98 and 72,066.24 is: 108,141.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,913.72 : 257,970.98 = 72,066.24 : x
  2. Step 2: Convert to fraction form
    171,913.72/257,970.98 = 72,066.24/x
  3. Step 3: Cross multiply
    171,913.72x = 257,970.98 × 72,066.24
  4. Step 4: Simplify right side
    171,913.72x = 18,590,998,557.72
  5. Step 5: Solve for x
    x = 18,590,998,557.72/171,913.72
  6. Step 6: Final answer
    x = 108,141.45

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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.