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Finding the Fourth Proportional to 108,515.20, 162,643.20 and 55,897.60

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Solution

The fourth proportional to 108,515.20, 162,643.20 and 55,897.60 is: 83,779.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,515.20 : 162,643.20 = 55,897.60 : x
  2. Step 2: Convert to fraction form
    108,515.20/162,643.20 = 55,897.60/x
  3. Step 3: Cross multiply
    108,515.20x = 162,643.20 × 55,897.60
  4. Step 4: Simplify right side
    108,515.20x = 9,091,364,536.32
  5. Step 5: Solve for x
    x = 9,091,364,536.32/108,515.20
  6. Step 6: Final answer
    x = 83,779.64

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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.