Home / 153,638.37-212,021.84-85,659.62

Finding the Fourth Proportional to 153,638.37, 212,021.84 and 85,659.62

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Solution

The fourth proportional to 153,638.37, 212,021.84 and 85,659.62 is: 118,210.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,638.37 : 212,021.84 = 85,659.62 : x
  2. Step 2: Convert to fraction form
    153,638.37/212,021.84 = 85,659.62/x
  3. Step 3: Cross multiply
    153,638.37x = 212,021.84 × 85,659.62
  4. Step 4: Simplify right side
    153,638.37x = 18,161,709,817.80
  5. Step 5: Solve for x
    x = 18,161,709,817.80/153,638.37
  6. Step 6: Final answer
    x = 118,210.77

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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.