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Finding the Fourth Proportional to 77,665.71, 107,152.90 and 63,300.87

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Solution

The fourth proportional to 77,665.71, 107,152.90 and 63,300.87 is: 87,334.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,665.71 : 107,152.90 = 63,300.87 : x
  2. Step 2: Convert to fraction form
    77,665.71/107,152.90 = 63,300.87/x
  3. Step 3: Cross multiply
    77,665.71x = 107,152.90 × 63,300.87
  4. Step 4: Simplify right side
    77,665.71x = 6,782,871,793.02
  5. Step 5: Solve for x
    x = 6,782,871,793.02/77,665.71
  6. Step 6: Final answer
    x = 87,334.19

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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.