Home / 212,923.55-319,378.34-86,526.29

Finding the Fourth Proportional to 212,923.55, 319,378.34 and 86,526.29

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Solution

The fourth proportional to 212,923.55, 319,378.34 and 86,526.29 is: 129,786.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,923.55 : 319,378.34 = 86,526.29 : x
  2. Step 2: Convert to fraction form
    212,923.55/319,378.34 = 86,526.29/x
  3. Step 3: Cross multiply
    212,923.55x = 319,378.34 × 86,526.29
  4. Step 4: Simplify right side
    212,923.55x = 27,634,623,881.32
  5. Step 5: Solve for x
    x = 27,634,623,881.32/212,923.55
  6. Step 6: Final answer
    x = 129,786.60

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1.5x scale

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.