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Finding the Fourth Proportional to 81,208.76, 112,068.92 and 45,400.76

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Solution

The fourth proportional to 81,208.76, 112,068.92 and 45,400.76 is: 62,653.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,208.76 : 112,068.92 = 45,400.76 : x
  2. Step 2: Convert to fraction form
    81,208.76/112,068.92 = 45,400.76/x
  3. Step 3: Cross multiply
    81,208.76x = 112,068.92 × 45,400.76
  4. Step 4: Simplify right side
    81,208.76x = 5,088,014,140.38
  5. Step 5: Solve for x
    x = 5,088,014,140.38/81,208.76
  6. Step 6: Final answer
    x = 62,653.51

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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.