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Finding the Fourth Proportional to 72,104.98, 99,505.08 and 40,275.10

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Solution

The fourth proportional to 72,104.98, 99,505.08 and 40,275.10 is: 55,579.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,104.98 : 99,505.08 = 40,275.10 : x
  2. Step 2: Convert to fraction form
    72,104.98/99,505.08 = 40,275.10/x
  3. Step 3: Cross multiply
    72,104.98x = 99,505.08 × 40,275.10
  4. Step 4: Simplify right side
    72,104.98x = 4,007,577,047.51
  5. Step 5: Solve for x
    x = 4,007,577,047.51/72,104.98
  6. Step 6: Final answer
    x = 55,579.75

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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.