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Finding the Fourth Proportional to 235,812.60, 325,428.21 and 128,384.46

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Solution

The fourth proportional to 235,812.60, 325,428.21 and 128,384.46 is: 177,174.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,812.60 : 325,428.21 = 128,384.46 : x
  2. Step 2: Convert to fraction form
    235,812.60/325,428.21 = 128,384.46/x
  3. Step 3: Cross multiply
    235,812.60x = 325,428.21 × 128,384.46
  4. Step 4: Simplify right side
    235,812.60x = 41,779,925,009.62
  5. Step 5: Solve for x
    x = 41,779,925,009.62/235,812.60
  6. Step 6: Final answer
    x = 177,174.27

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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.