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Finding the Fourth Proportional to 110,695.40, 165,848.70 and 90,866.60

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Solution

The fourth proportional to 110,695.40, 165,848.70 and 90,866.60 is: 136,140.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,695.40 : 165,848.70 = 90,866.60 : x
  2. Step 2: Convert to fraction form
    110,695.40/165,848.70 = 90,866.60/x
  3. Step 3: Cross multiply
    110,695.40x = 165,848.70 × 90,866.60
  4. Step 4: Simplify right side
    110,695.40x = 15,070,107,483.42
  5. Step 5: Solve for x
    x = 15,070,107,483.42/110,695.40
  6. Step 6: Final answer
    x = 136,140.32

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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.