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Finding the Fourth Proportional to 77,645.61, 107,157.78 and 45,808.29

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Solution

The fourth proportional to 77,645.61, 107,157.78 and 45,808.29 is: 63,219.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,645.61 : 107,157.78 = 45,808.29 : x
  2. Step 2: Convert to fraction form
    77,645.61/107,157.78 = 45,808.29/x
  3. Step 3: Cross multiply
    77,645.61x = 107,157.78 × 45,808.29
  4. Step 4: Simplify right side
    77,645.61x = 4,908,714,662.00
  5. Step 5: Solve for x
    x = 4,908,714,662.00/77,645.61
  6. Step 6: Final answer
    x = 63,219.47

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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.