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Finding the Fourth Proportional to 127,870.80, 191,820.60 and 39,123.60

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Solution

The fourth proportional to 127,870.80, 191,820.60 and 39,123.60 is: 58,689.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,870.80 : 191,820.60 = 39,123.60 : x
  2. Step 2: Convert to fraction form
    127,870.80/191,820.60 = 39,123.60/x
  3. Step 3: Cross multiply
    127,870.80x = 191,820.60 × 39,123.60
  4. Step 4: Simplify right side
    127,870.80x = 7,504,712,426.16
  5. Step 5: Solve for x
    x = 7,504,712,426.16/127,870.80
  6. Step 6: Final answer
    x = 58,689.81

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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.