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Finding the Fourth Proportional to 117,420.60, 176,054.40 and 77,318.28

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Solution

The fourth proportional to 117,420.60, 176,054.40 and 77,318.28 is: 115,927.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,420.60 : 176,054.40 = 77,318.28 : x
  2. Step 2: Convert to fraction form
    117,420.60/176,054.40 = 77,318.28/x
  3. Step 3: Cross multiply
    117,420.60x = 176,054.40 × 77,318.28
  4. Step 4: Simplify right side
    117,420.60x = 13,612,223,394.43
  5. Step 5: Solve for x
    x = 13,612,223,394.43/117,420.60
  6. Step 6: Final answer
    x = 115,927.05

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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.