Home / 145,400.45-200,670.57-81,736.88

Finding the Fourth Proportional to 145,400.45, 200,670.57 and 81,736.88

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Solution

The fourth proportional to 145,400.45, 200,670.57 and 81,736.88 is: 112,806.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,400.45 : 200,670.57 = 81,736.88 : x
  2. Step 2: Convert to fraction form
    145,400.45/200,670.57 = 81,736.88/x
  3. Step 3: Cross multiply
    145,400.45x = 200,670.57 × 81,736.88
  4. Step 4: Simplify right side
    145,400.45x = 16,402,185,296.27
  5. Step 5: Solve for x
    x = 16,402,185,296.27/145,400.45
  6. Step 6: Final answer
    x = 112,806.98

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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.