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Finding the Fourth Proportional to 117,980.40, 176,711.40 and 102,428.40

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Solution

The fourth proportional to 117,980.40, 176,711.40 and 102,428.40 is: 153,417.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,980.40 : 176,711.40 = 102,428.40 : x
  2. Step 2: Convert to fraction form
    117,980.40/176,711.40 = 102,428.40/x
  3. Step 3: Cross multiply
    117,980.40x = 176,711.40 × 102,428.40
  4. Step 4: Simplify right side
    117,980.40x = 18,100,265,963.76
  5. Step 5: Solve for x
    x = 18,100,265,963.76/117,980.40
  6. Step 6: Final answer
    x = 153,417.57

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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.