Home / 229,128.30-316,182.72-138,430.65

Finding the Fourth Proportional to 229,128.30, 316,182.72 and 138,430.65

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Solution

The fourth proportional to 229,128.30, 316,182.72 and 138,430.65 is: 191,025.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,128.30 : 316,182.72 = 138,430.65 : x
  2. Step 2: Convert to fraction form
    229,128.30/316,182.72 = 138,430.65/x
  3. Step 3: Cross multiply
    229,128.30x = 316,182.72 × 138,430.65
  4. Step 4: Simplify right side
    229,128.30x = 43,769,379,448.37
  5. Step 5: Solve for x
    x = 43,769,379,448.37/229,128.30
  6. Step 6: Final answer
    x = 191,025.64

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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.