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Finding the Fourth Proportional to 70,417.80, 105,637.32 and 30,447.72

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Solution

The fourth proportional to 70,417.80, 105,637.32 and 30,447.72 is: 45,676.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,417.80 : 105,637.32 = 30,447.72 : x
  2. Step 2: Convert to fraction form
    70,417.80/105,637.32 = 30,447.72/x
  3. Step 3: Cross multiply
    70,417.80x = 105,637.32 × 30,447.72
  4. Step 4: Simplify right side
    70,417.80x = 3,216,415,540.91
  5. Step 5: Solve for x
    x = 3,216,415,540.91/70,417.80
  6. Step 6: Final answer
    x = 45,676.17

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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.