Home / 154,000.07-212,505.09-86,011.64

Finding the Fourth Proportional to 154,000.07, 212,505.09 and 86,011.64

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Solution

The fourth proportional to 154,000.07, 212,505.09 and 86,011.64 is: 118,687.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,000.07 : 212,505.09 = 86,011.64 : x
  2. Step 2: Convert to fraction form
    154,000.07/212,505.09 = 86,011.64/x
  3. Step 3: Cross multiply
    154,000.07x = 212,505.09 × 86,011.64
  4. Step 4: Simplify right side
    154,000.07x = 18,277,911,299.25
  5. Step 5: Solve for x
    x = 18,277,911,299.25/154,000.07
  6. Step 6: Final answer
    x = 118,687.68

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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.