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Finding the Fourth Proportional to 79,488.90, 109,670.76 and 47,646.18

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Solution

The fourth proportional to 79,488.90, 109,670.76 and 47,646.18 is: 65,737.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,488.90 : 109,670.76 = 47,646.18 : x
  2. Step 2: Convert to fraction form
    79,488.90/109,670.76 = 47,646.18/x
  3. Step 3: Cross multiply
    79,488.90x = 109,670.76 × 47,646.18
  4. Step 4: Simplify right side
    79,488.90x = 5,225,392,771.70
  5. Step 5: Solve for x
    x = 5,225,392,771.70/79,488.90
  6. Step 6: Final answer
    x = 65,737.39

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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.