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Finding the Fourth Proportional to 145,968.44, 201,436.72 and 78,900.44

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Solution

The fourth proportional to 145,968.44, 201,436.72 and 78,900.44 is: 108,882.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,968.44 : 201,436.72 = 78,900.44 : x
  2. Step 2: Convert to fraction form
    145,968.44/201,436.72 = 78,900.44/x
  3. Step 3: Cross multiply
    145,968.44x = 201,436.72 × 78,900.44
  4. Step 4: Simplify right side
    145,968.44x = 15,893,445,840.16
  5. Step 5: Solve for x
    x = 15,893,445,840.16/145,968.44
  6. Step 6: Final answer
    x = 108,882.75

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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.