Home / 113,815.70-170,723.55-78,386.30

Finding the Fourth Proportional to 113,815.70, 170,723.55 and 78,386.30

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Solution

The fourth proportional to 113,815.70, 170,723.55 and 78,386.30 is: 117,579.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,815.70 : 170,723.55 = 78,386.30 : x
  2. Step 2: Convert to fraction form
    113,815.70/170,723.55 = 78,386.30/x
  3. Step 3: Cross multiply
    113,815.70x = 170,723.55 × 78,386.30
  4. Step 4: Simplify right side
    113,815.70x = 13,382,387,407.37
  5. Step 5: Solve for x
    x = 13,382,387,407.37/113,815.70
  6. Step 6: Final answer
    x = 117,579.45

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1.5x scale

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.