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Finding the Fourth Proportional to 145,009.92, 200,113.98 and 81,347.64

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Solution

The fourth proportional to 145,009.92, 200,113.98 and 81,347.64 is: 112,259.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,009.92 : 200,113.98 = 81,347.64 : x
  2. Step 2: Convert to fraction form
    145,009.92/200,113.98 = 81,347.64/x
  3. Step 3: Cross multiply
    145,009.92x = 200,113.98 × 81,347.64
  4. Step 4: Simplify right side
    145,009.92x = 16,278,800,004.01
  5. Step 5: Solve for x
    x = 16,278,800,004.01/145,009.92
  6. Step 6: Final answer
    x = 112,259.91

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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.