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Finding the Fourth Proportional to 228,509.10, 315,342.72 and 125,142.77

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Solution

The fourth proportional to 228,509.10, 315,342.72 and 125,142.77 is: 172,697.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,509.10 : 315,342.72 = 125,142.77 : x
  2. Step 2: Convert to fraction form
    228,509.10/315,342.72 = 125,142.77/x
  3. Step 3: Cross multiply
    228,509.10x = 315,342.72 × 125,142.77
  4. Step 4: Simplify right side
    228,509.10x = 39,462,862,268.49
  5. Step 5: Solve for x
    x = 39,462,862,268.49/228,509.10
  6. Step 6: Final answer
    x = 172,697.11

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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.