Home / 115,931.44-159,991.40-64,941.20

Finding the Fourth Proportional to 115,931.44, 159,991.40 and 64,941.20

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Solution

The fourth proportional to 115,931.44, 159,991.40 and 64,941.20 is: 89,622.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,931.44 : 159,991.40 = 64,941.20 : x
  2. Step 2: Convert to fraction form
    115,931.44/159,991.40 = 64,941.20/x
  3. Step 3: Cross multiply
    115,931.44x = 159,991.40 × 64,941.20
  4. Step 4: Simplify right side
    115,931.44x = 10,390,033,505.68
  5. Step 5: Solve for x
    x = 10,390,033,505.68/115,931.44
  6. Step 6: Final answer
    x = 89,622.22

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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.