Home / 70,606.36-105,909.55-20,686.47

Finding the Fourth Proportional to 70,606.36, 105,909.55 and 20,686.47

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Solution

The fourth proportional to 70,606.36, 105,909.55 and 20,686.47 is: 31,029.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,606.36 : 105,909.55 = 20,686.47 : x
  2. Step 2: Convert to fraction form
    70,606.36/105,909.55 = 20,686.47/x
  3. Step 3: Cross multiply
    70,606.36x = 105,909.55 × 20,686.47
  4. Step 4: Simplify right side
    70,606.36x = 2,190,894,279.91
  5. Step 5: Solve for x
    x = 2,190,894,279.91/70,606.36
  6. Step 6: Final answer
    x = 31,029.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.