Home / 171,669.60-257,581.20-78,127.20

Finding the Fourth Proportional to 171,669.60, 257,581.20 and 78,127.20

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Solution

The fourth proportional to 171,669.60, 257,581.20 and 78,127.20 is: 117,225.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,669.60 : 257,581.20 = 78,127.20 : x
  2. Step 2: Convert to fraction form
    171,669.60/257,581.20 = 78,127.20/x
  3. Step 3: Cross multiply
    171,669.60x = 257,581.20 × 78,127.20
  4. Step 4: Simplify right side
    171,669.60x = 20,124,097,928.64
  5. Step 5: Solve for x
    x = 20,124,097,928.64/171,669.60
  6. Step 6: Final answer
    x = 117,225.75

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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.