Home / 97,128.40-145,606.20-57,643.60

Finding the Fourth Proportional to 97,128.40, 145,606.20 and 57,643.60

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Solution

The fourth proportional to 97,128.40, 145,606.20 and 57,643.60 is: 86,414.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,128.40 : 145,606.20 = 57,643.60 : x
  2. Step 2: Convert to fraction form
    97,128.40/145,606.20 = 57,643.60/x
  3. Step 3: Cross multiply
    97,128.40x = 145,606.20 × 57,643.60
  4. Step 4: Simplify right side
    97,128.40x = 8,393,265,550.32
  5. Step 5: Solve for x
    x = 8,393,265,550.32/97,128.40
  6. Step 6: Final answer
    x = 86,414.12

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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.