Home / 145,100.40-200,213.28-81,440.88

Finding the Fourth Proportional to 145,100.40, 200,213.28 and 81,440.88

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Solution

The fourth proportional to 145,100.40, 200,213.28 and 81,440.88 is: 112,374.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,100.40 : 200,213.28 = 81,440.88 : x
  2. Step 2: Convert to fraction form
    145,100.40/200,213.28 = 81,440.88/x
  3. Step 3: Cross multiply
    145,100.40x = 200,213.28 × 81,440.88
  4. Step 4: Simplify right side
    145,100.40x = 16,305,545,710.89
  5. Step 5: Solve for x
    x = 16,305,545,710.89/145,100.40
  6. Step 6: Final answer
    x = 112,374.23

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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.