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Finding the Fourth Proportional to 171,855.60, 257,491.80 and 142,112.40

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Solution

The fourth proportional to 171,855.60, 257,491.80 and 142,112.40 is: 212,927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,855.60 : 257,491.80 = 142,112.40 : x
  2. Step 2: Convert to fraction form
    171,855.60/257,491.80 = 142,112.40/x
  3. Step 3: Cross multiply
    171,855.60x = 257,491.80 × 142,112.40
  4. Step 4: Simplify right side
    171,855.60x = 36,592,777,678.32
  5. Step 5: Solve for x
    x = 36,592,777,678.32/171,855.60
  6. Step 6: Final answer
    x = 212,927.47

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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.