Home / 77,215.72-115,756.56-30,457.12

Finding the Fourth Proportional to 77,215.72, 115,756.56 and 30,457.12

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Solution

The fourth proportional to 77,215.72, 115,756.56 and 30,457.12 is: 45,659.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,215.72 : 115,756.56 = 30,457.12 : x
  2. Step 2: Convert to fraction form
    77,215.72/115,756.56 = 30,457.12/x
  3. Step 3: Cross multiply
    77,215.72x = 115,756.56 × 30,457.12
  4. Step 4: Simplify right side
    77,215.72x = 3,525,611,438.71
  5. Step 5: Solve for x
    x = 3,525,611,438.71/77,215.72
  6. Step 6: Final answer
    x = 45,659.24

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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.