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Finding the Fourth Proportional to 77,775.51, 107,340.63 and 43,790.74

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Solution

The fourth proportional to 77,775.51, 107,340.63 and 43,790.74 is: 60,437.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,775.51 : 107,340.63 = 43,790.74 : x
  2. Step 2: Convert to fraction form
    77,775.51/107,340.63 = 43,790.74/x
  3. Step 3: Cross multiply
    77,775.51x = 107,340.63 × 43,790.74
  4. Step 4: Simplify right side
    77,775.51x = 4,700,525,619.77
  5. Step 5: Solve for x
    x = 4,700,525,619.77/77,775.51
  6. Step 6: Final answer
    x = 60,437.09

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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.