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Finding the Fourth Proportional to 77,426.61, 106,855.79 and 47,213.61

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Solution

The fourth proportional to 77,426.61, 106,855.79 and 47,213.61 is: 65,159.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,426.61 : 106,855.79 = 47,213.61 : x
  2. Step 2: Convert to fraction form
    77,426.61/106,855.79 = 47,213.61/x
  3. Step 3: Cross multiply
    77,426.61x = 106,855.79 × 47,213.61
  4. Step 4: Simplify right side
    77,426.61x = 5,045,047,359.23
  5. Step 5: Solve for x
    x = 5,045,047,359.23/77,426.61
  6. Step 6: Final answer
    x = 65,159.09

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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.