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Finding the Fourth Proportional to 171,946.40, 257,919.60 and 47,287.40

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Solution

The fourth proportional to 171,946.40, 257,919.60 and 47,287.40 is: 70,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,946.40 : 257,919.60 = 47,287.40 : x
  2. Step 2: Convert to fraction form
    171,946.40/257,919.60 = 47,287.40/x
  3. Step 3: Cross multiply
    171,946.40x = 257,919.60 × 47,287.40
  4. Step 4: Simplify right side
    171,946.40x = 12,196,347,293.04
  5. Step 5: Solve for x
    x = 12,196,347,293.04/171,946.40
  6. Step 6: Final answer
    x = 70,931.10

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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.