Home / 212,916.60-319,374.94-86,625.56

Finding the Fourth Proportional to 212,916.60, 319,374.94 and 86,625.56

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Solution

The fourth proportional to 212,916.60, 319,374.94 and 86,625.56 is: 129,938.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,916.60 : 319,374.94 = 86,625.56 : x
  2. Step 2: Convert to fraction form
    212,916.60/319,374.94 = 86,625.56/x
  3. Step 3: Cross multiply
    212,916.60x = 319,374.94 × 86,625.56
  4. Step 4: Simplify right side
    212,916.60x = 27,666,033,027.47
  5. Step 5: Solve for x
    x = 27,666,033,027.47/212,916.60
  6. Step 6: Final answer
    x = 129,938.36

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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.