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Finding the Fourth Proportional to 77,687.51, 107,212.02 and 45,856.40

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Solution

The fourth proportional to 77,687.51, 107,212.02 and 45,856.40 is: 63,283.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,687.51 : 107,212.02 = 45,856.40 : x
  2. Step 2: Convert to fraction form
    77,687.51/107,212.02 = 45,856.40/x
  3. Step 3: Cross multiply
    77,687.51x = 107,212.02 × 45,856.40
  4. Step 4: Simplify right side
    77,687.51x = 4,916,357,273.93
  5. Step 5: Solve for x
    x = 4,916,357,273.93/77,687.51
  6. Step 6: Final answer
    x = 63,283.75

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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.