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Finding the Fourth Proportional to 315,145.64, 472,718.52 and 104,785.40

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Solution

The fourth proportional to 315,145.64, 472,718.52 and 104,785.40 is: 157,178.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,145.64 : 472,718.52 = 104,785.40 : x
  2. Step 2: Convert to fraction form
    315,145.64/472,718.52 = 104,785.40/x
  3. Step 3: Cross multiply
    315,145.64x = 472,718.52 × 104,785.40
  4. Step 4: Simplify right side
    315,145.64x = 49,533,999,205.61
  5. Step 5: Solve for x
    x = 49,533,999,205.61/315,145.64
  6. Step 6: Final answer
    x = 157,178.12

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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.