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Finding the Fourth Proportional to 104,145.79, 143,720.90 and 56,399.12

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Solution

The fourth proportional to 104,145.79, 143,720.90 and 56,399.12 is: 77,830.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,145.79 : 143,720.90 = 56,399.12 : x
  2. Step 2: Convert to fraction form
    104,145.79/143,720.90 = 56,399.12/x
  3. Step 3: Cross multiply
    104,145.79x = 143,720.90 × 56,399.12
  4. Step 4: Simplify right side
    104,145.79x = 8,105,732,003.61
  5. Step 5: Solve for x
    x = 8,105,732,003.61/104,145.79
  6. Step 6: Final answer
    x = 77,830.63

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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.