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Finding the Fourth Proportional to 171,607.40, 257,411.10 and 145,428.20

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Solution

The fourth proportional to 171,607.40, 257,411.10 and 145,428.20 is: 218,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,607.40 : 257,411.10 = 145,428.20 : x
  2. Step 2: Convert to fraction form
    171,607.40/257,411.10 = 145,428.20/x
  3. Step 3: Cross multiply
    171,607.40x = 257,411.10 × 145,428.20
  4. Step 4: Simplify right side
    171,607.40x = 37,434,832,933.02
  5. Step 5: Solve for x
    x = 37,434,832,933.02/171,607.40
  6. Step 6: Final answer
    x = 218,142.30

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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.