Home / 81,391.14-112,316.49-47,400.66

Finding the Fourth Proportional to 81,391.14, 112,316.49 and 47,400.66

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Solution

The fourth proportional to 81,391.14, 112,316.49 and 47,400.66 is: 65,411.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.14 : 112,316.49 = 47,400.66 : x
  2. Step 2: Convert to fraction form
    81,391.14/112,316.49 = 47,400.66/x
  3. Step 3: Cross multiply
    81,391.14x = 112,316.49 × 47,400.66
  4. Step 4: Simplify right side
    81,391.14x = 5,323,875,754.88
  5. Step 5: Solve for x
    x = 5,323,875,754.88/81,391.14
  6. Step 6: Final answer
    x = 65,411.00

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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.