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Finding the Fourth Proportional to 117,539.20, 176,384.40 and 64,986.40

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Solution

The fourth proportional to 117,539.20, 176,384.40 and 64,986.40 is: 97,521.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,539.20 : 176,384.40 = 64,986.40 : x
  2. Step 2: Convert to fraction form
    117,539.20/176,384.40 = 64,986.40/x
  3. Step 3: Cross multiply
    117,539.20x = 176,384.40 × 64,986.40
  4. Step 4: Simplify right side
    117,539.20x = 11,462,587,172.16
  5. Step 5: Solve for x
    x = 11,462,587,172.16/117,539.20
  6. Step 6: Final answer
    x = 97,521.40

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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.