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Finding the Fourth Proportional to 79,290.80, 109,478.68 and 51,045.68

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Solution

The fourth proportional to 79,290.80, 109,478.68 and 51,045.68 is: 70,479.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,290.80 : 109,478.68 = 51,045.68 : x
  2. Step 2: Convert to fraction form
    79,290.80/109,478.68 = 51,045.68/x
  3. Step 3: Cross multiply
    79,290.80x = 109,478.68 × 51,045.68
  4. Step 4: Simplify right side
    79,290.80x = 5,588,413,666.10
  5. Step 5: Solve for x
    x = 5,588,413,666.10/79,290.80
  6. Step 6: Final answer
    x = 70,479.98

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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.