Home / 210,815.10-290,922.48-115,320.65

Finding the Fourth Proportional to 210,815.10, 290,922.48 and 115,320.65

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Solution

The fourth proportional to 210,815.10, 290,922.48 and 115,320.65 is: 159,141.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,815.10 : 290,922.48 = 115,320.65 : x
  2. Step 2: Convert to fraction form
    210,815.10/290,922.48 = 115,320.65/x
  3. Step 3: Cross multiply
    210,815.10x = 290,922.48 × 115,320.65
  4. Step 4: Simplify right side
    210,815.10x = 33,549,368,038.60
  5. Step 5: Solve for x
    x = 33,549,368,038.60/210,815.10
  6. Step 6: Final answer
    x = 159,141.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.