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Finding the Fourth Proportional to 106,830.42, 147,420 and 58,422.72

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Solution

The fourth proportional to 106,830.42, 147,420 and 58,422.72 is: 80,620.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,830.42 : 147,420 = 58,422.72 : x
  2. Step 2: Convert to fraction form
    106,830.42/147,420 = 58,422.72/x
  3. Step 3: Cross multiply
    106,830.42x = 147,420 × 58,422.72
  4. Step 4: Simplify right side
    106,830.42x = 8,612,677,382.40
  5. Step 5: Solve for x
    x = 8,612,677,382.40/106,830.42
  6. Step 6: Final answer
    x = 80,620.08

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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.