Home / 100,217.61-138,261.81-57,199.50

Finding the Fourth Proportional to 100,217.61, 138,261.81 and 57,199.50

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Solution

The fourth proportional to 100,217.61, 138,261.81 and 57,199.50 is: 78,913.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,217.61 : 138,261.81 = 57,199.50 : x
  2. Step 2: Convert to fraction form
    100,217.61/138,261.81 = 57,199.50/x
  3. Step 3: Cross multiply
    100,217.61x = 138,261.81 × 57,199.50
  4. Step 4: Simplify right side
    100,217.61x = 7,908,506,401.10
  5. Step 5: Solve for x
    x = 7,908,506,401.10/100,217.61
  6. Step 6: Final answer
    x = 78,913.34

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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.