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Finding the Fourth Proportional to 79,436.80, 109,615.92 and 45,438.40

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Solution

The fourth proportional to 79,436.80, 109,615.92 and 45,438.40 is: 62,701.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,436.80 : 109,615.92 = 45,438.40 : x
  2. Step 2: Convert to fraction form
    79,436.80/109,615.92 = 45,438.40/x
  3. Step 3: Cross multiply
    79,436.80x = 109,615.92 × 45,438.40
  4. Step 4: Simplify right side
    79,436.80x = 4,980,772,019.33
  5. Step 5: Solve for x
    x = 4,980,772,019.33/79,436.80
  6. Step 6: Final answer
    x = 62,701.07

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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.