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Finding the Fourth Proportional to 81,004.65, 121,342.95 and 45,903.30

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Solution

The fourth proportional to 81,004.65, 121,342.95 and 45,903.30 is: 68,762.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,004.65 : 121,342.95 = 45,903.30 : x
  2. Step 2: Convert to fraction form
    81,004.65/121,342.95 = 45,903.30/x
  3. Step 3: Cross multiply
    81,004.65x = 121,342.95 × 45,903.30
  4. Step 4: Simplify right side
    81,004.65x = 5,570,041,836.74
  5. Step 5: Solve for x
    x = 5,570,041,836.74/81,004.65
  6. Step 6: Final answer
    x = 68,762.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.