Home / 212,881.37-319,322.07-86,590.31

Finding the Fourth Proportional to 212,881.37, 319,322.07 and 86,590.31

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Solution

The fourth proportional to 212,881.37, 319,322.07 and 86,590.31 is: 129,885.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,881.37 : 319,322.07 = 86,590.31 : x
  2. Step 2: Convert to fraction form
    212,881.37/319,322.07 = 86,590.31/x
  3. Step 3: Cross multiply
    212,881.37x = 319,322.07 × 86,590.31
  4. Step 4: Simplify right side
    212,881.37x = 27,650,195,434.53
  5. Step 5: Solve for x
    x = 27,650,195,434.53/212,881.37
  6. Step 6: Final answer
    x = 129,885.47

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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.