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Finding the Fourth Proportional to 154,108.59, 212,665.64 and 86,125.86

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Solution

The fourth proportional to 154,108.59, 212,665.64 and 86,125.86 is: 118,851.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,108.59 : 212,665.64 = 86,125.86 : x
  2. Step 2: Convert to fraction form
    154,108.59/212,665.64 = 86,125.86/x
  3. Step 3: Cross multiply
    154,108.59x = 212,665.64 × 86,125.86
  4. Step 4: Simplify right side
    154,108.59x = 18,316,010,706.82
  5. Step 5: Solve for x
    x = 18,316,010,706.82/154,108.59
  6. Step 6: Final answer
    x = 118,851.33

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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.