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Finding the Fourth Proportional to 315,369.06, 435,206.18 and 172,127.86

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Solution

The fourth proportional to 315,369.06, 435,206.18 and 172,127.86 is: 237,534.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,369.06 : 435,206.18 = 172,127.86 : x
  2. Step 2: Convert to fraction form
    315,369.06/435,206.18 = 172,127.86/x
  3. Step 3: Cross multiply
    315,369.06x = 435,206.18 × 172,127.86
  4. Step 4: Simplify right side
    315,369.06x = 74,911,108,422.17
  5. Step 5: Solve for x
    x = 74,911,108,422.17/315,369.06
  6. Step 6: Final answer
    x = 237,534.74

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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.