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Finding the Fourth Proportional to 77,112.20, 115,668.30 and 65,302.40

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Solution

The fourth proportional to 77,112.20, 115,668.30 and 65,302.40 is: 97,953.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,112.20 : 115,668.30 = 65,302.40 : x
  2. Step 2: Convert to fraction form
    77,112.20/115,668.30 = 65,302.40/x
  3. Step 3: Cross multiply
    77,112.20x = 115,668.30 × 65,302.40
  4. Step 4: Simplify right side
    77,112.20x = 7,553,417,593.92
  5. Step 5: Solve for x
    x = 7,553,417,593.92/77,112.20
  6. Step 6: Final answer
    x = 97,953.60

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1.5x scale

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.