Home / 108,931.20-163,396.80-71,606.40

Finding the Fourth Proportional to 108,931.20, 163,396.80 and 71,606.40

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Solution

The fourth proportional to 108,931.20, 163,396.80 and 71,606.40 is: 107,409.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,931.20 : 163,396.80 = 71,606.40 : x
  2. Step 2: Convert to fraction form
    108,931.20/163,396.80 = 71,606.40/x
  3. Step 3: Cross multiply
    108,931.20x = 163,396.80 × 71,606.40
  4. Step 4: Simplify right side
    108,931.20x = 11,700,256,619.52
  5. Step 5: Solve for x
    x = 11,700,256,619.52/108,931.20
  6. Step 6: Final answer
    x = 107,409.60

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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.