Home / 155,156.04-214,167.78-100,782.36

Finding the Fourth Proportional to 155,156.04, 214,167.78 and 100,782.36

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Solution

The fourth proportional to 155,156.04, 214,167.78 and 100,782.36 is: 139,113.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,156.04 : 214,167.78 = 100,782.36 : x
  2. Step 2: Convert to fraction form
    155,156.04/214,167.78 = 100,782.36/x
  3. Step 3: Cross multiply
    155,156.04x = 214,167.78 × 100,782.36
  4. Step 4: Simplify right side
    155,156.04x = 21,584,334,304.36
  5. Step 5: Solve for x
    x = 21,584,334,304.36/155,156.04
  6. Step 6: Final answer
    x = 139,113.72

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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.