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Finding the Fourth Proportional to 78,479.94, 108,301.11 and 42,669.63

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Solution

The fourth proportional to 78,479.94, 108,301.11 and 42,669.63 is: 58,883.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,479.94 : 108,301.11 = 42,669.63 : x
  2. Step 2: Convert to fraction form
    78,479.94/108,301.11 = 42,669.63/x
  3. Step 3: Cross multiply
    78,479.94x = 108,301.11 × 42,669.63
  4. Step 4: Simplify right side
    78,479.94x = 4,621,168,292.29
  5. Step 5: Solve for x
    x = 4,621,168,292.29/78,479.94
  6. Step 6: Final answer
    x = 58,883.43

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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.