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Finding the Fourth Proportional to 98,810.80, 148,235.40 and 28,692.40

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Solution

The fourth proportional to 98,810.80, 148,235.40 and 28,692.40 is: 43,044.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,810.80 : 148,235.40 = 28,692.40 : x
  2. Step 2: Convert to fraction form
    98,810.80/148,235.40 = 28,692.40/x
  3. Step 3: Cross multiply
    98,810.80x = 148,235.40 × 28,692.40
  4. Step 4: Simplify right side
    98,810.80x = 4,253,229,390.96
  5. Step 5: Solve for x
    x = 4,253,229,390.96/98,810.80
  6. Step 6: Final answer
    x = 43,044.18

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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.