Home / 78,722.10-118,097.55-31,979.70

Finding the Fourth Proportional to 78,722.10, 118,097.55 and 31,979.70

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Solution

The fourth proportional to 78,722.10, 118,097.55 and 31,979.70 is: 47,975.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,722.10 : 118,097.55 = 31,979.70 : x
  2. Step 2: Convert to fraction form
    78,722.10/118,097.55 = 31,979.70/x
  3. Step 3: Cross multiply
    78,722.10x = 118,097.55 × 31,979.70
  4. Step 4: Simplify right side
    78,722.10x = 3,776,724,219.74
  5. Step 5: Solve for x
    x = 3,776,724,219.74/78,722.10
  6. Step 6: Final answer
    x = 47,975.40

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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.