Home / 79,490.40-109,707.12-51,278.10

Finding the Fourth Proportional to 79,490.40, 109,707.12 and 51,278.10

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Solution

The fourth proportional to 79,490.40, 109,707.12 and 51,278.10 is: 70,770.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,490.40 : 109,707.12 = 51,278.10 : x
  2. Step 2: Convert to fraction form
    79,490.40/109,707.12 = 51,278.10/x
  3. Step 3: Cross multiply
    79,490.40x = 109,707.12 × 51,278.10
  4. Step 4: Simplify right side
    79,490.40x = 5,625,572,670.07
  5. Step 5: Solve for x
    x = 5,625,572,670.07/79,490.40
  6. Step 6: Final answer
    x = 70,770.47

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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.