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Finding the Fourth Proportional to 79,488.90, 109,692.45 and 43,678.89

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Solution

The fourth proportional to 79,488.90, 109,692.45 and 43,678.89 is: 60,275.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,488.90 : 109,692.45 = 43,678.89 : x
  2. Step 2: Convert to fraction form
    79,488.90/109,692.45 = 43,678.89/x
  3. Step 3: Cross multiply
    79,488.90x = 109,692.45 × 43,678.89
  4. Step 4: Simplify right side
    79,488.90x = 4,791,244,457.38
  5. Step 5: Solve for x
    x = 4,791,244,457.38/79,488.90
  6. Step 6: Final answer
    x = 60,275.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.