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Finding the Fourth Proportional to 113,606.40, 170,409.60 and 57,619.20

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Solution

The fourth proportional to 113,606.40, 170,409.60 and 57,619.20 is: 86,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,606.40 : 170,409.60 = 57,619.20 : x
  2. Step 2: Convert to fraction form
    113,606.40/170,409.60 = 57,619.20/x
  3. Step 3: Cross multiply
    113,606.40x = 170,409.60 × 57,619.20
  4. Step 4: Simplify right side
    113,606.40x = 9,818,864,824.32
  5. Step 5: Solve for x
    x = 9,818,864,824.32/113,606.40
  6. Step 6: Final answer
    x = 86,428.80

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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.