Home / 108,972.80-163,070.40-99,641.60

Finding the Fourth Proportional to 108,972.80, 163,070.40 and 99,641.60

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Solution

The fourth proportional to 108,972.80, 163,070.40 and 99,641.60 is: 149,106.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,972.80 : 163,070.40 = 99,641.60 : x
  2. Step 2: Convert to fraction form
    108,972.80/163,070.40 = 99,641.60/x
  3. Step 3: Cross multiply
    108,972.80x = 163,070.40 × 99,641.60
  4. Step 4: Simplify right side
    108,972.80x = 16,248,595,568.64
  5. Step 5: Solve for x
    x = 16,248,595,568.64/108,972.80
  6. Step 6: Final answer
    x = 149,106.89

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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.