Home / 229,428.72-316,615.32-128,824.56

Finding the Fourth Proportional to 229,428.72, 316,615.32 and 128,824.56

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Solution

The fourth proportional to 229,428.72, 316,615.32 and 128,824.56 is: 177,779.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,428.72 : 316,615.32 = 128,824.56 : x
  2. Step 2: Convert to fraction form
    229,428.72/316,615.32 = 128,824.56/x
  3. Step 3: Cross multiply
    229,428.72x = 316,615.32 × 128,824.56
  4. Step 4: Simplify right side
    229,428.72x = 40,787,829,288.26
  5. Step 5: Solve for x
    x = 40,787,829,288.26/229,428.72
  6. Step 6: Final answer
    x = 177,779.96

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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.