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Finding the Fourth Proportional to 72,309.45, 99,784.13 and 42,095.64

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Solution

The fourth proportional to 72,309.45, 99,784.13 and 42,095.64 is: 58,090.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,309.45 : 99,784.13 = 42,095.64 : x
  2. Step 2: Convert to fraction form
    72,309.45/99,784.13 = 42,095.64/x
  3. Step 3: Cross multiply
    72,309.45x = 99,784.13 × 42,095.64
  4. Step 4: Simplify right side
    72,309.45x = 4,200,476,603.72
  5. Step 5: Solve for x
    x = 4,200,476,603.72/72,309.45
  6. Step 6: Final answer
    x = 58,090.29

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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.