Home / 100,643.02-138,885.76-55,320.02

Finding the Fourth Proportional to 100,643.02, 138,885.76 and 55,320.02

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Solution

The fourth proportional to 100,643.02, 138,885.76 and 55,320.02 is: 76,340.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,643.02 : 138,885.76 = 55,320.02 : x
  2. Step 2: Convert to fraction form
    100,643.02/138,885.76 = 55,320.02/x
  3. Step 3: Cross multiply
    100,643.02x = 138,885.76 × 55,320.02
  4. Step 4: Simplify right side
    100,643.02x = 7,683,163,020.92
  5. Step 5: Solve for x
    x = 7,683,163,020.92/100,643.02
  6. Step 6: Final answer
    x = 76,340.74

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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.