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Finding the Fourth Proportional to 117,990.40, 176,985.60 and 39,107.20

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Solution

The fourth proportional to 117,990.40, 176,985.60 and 39,107.20 is: 58,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,990.40 : 176,985.60 = 39,107.20 : x
  2. Step 2: Convert to fraction form
    117,990.40/176,985.60 = 39,107.20/x
  3. Step 3: Cross multiply
    117,990.40x = 176,985.60 × 39,107.20
  4. Step 4: Simplify right side
    117,990.40x = 6,921,411,256.32
  5. Step 5: Solve for x
    x = 6,921,411,256.32/117,990.40
  6. Step 6: Final answer
    x = 58,660.80

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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.