Home / 212,948.70-319,886.90-128,748.54

Finding the Fourth Proportional to 212,948.70, 319,886.90 and 128,748.54

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Solution

The fourth proportional to 212,948.70, 319,886.90 and 128,748.54 is: 193,403.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,948.70 : 319,886.90 = 128,748.54 : x
  2. Step 2: Convert to fraction form
    212,948.70/319,886.90 = 128,748.54/x
  3. Step 3: Cross multiply
    212,948.70x = 319,886.90 × 128,748.54
  4. Step 4: Simplify right side
    212,948.70x = 41,184,971,340.13
  5. Step 5: Solve for x
    x = 41,184,971,340.13/212,948.70
  6. Step 6: Final answer
    x = 193,403.25

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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.