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Finding the Fourth Proportional to 105,055.20, 157,291.20 and 102,139.20

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Solution

The fourth proportional to 105,055.20, 157,291.20 and 102,139.20 is: 152,925.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,055.20 : 157,291.20 = 102,139.20 : x
  2. Step 2: Convert to fraction form
    105,055.20/157,291.20 = 102,139.20/x
  3. Step 3: Cross multiply
    105,055.20x = 157,291.20 × 102,139.20
  4. Step 4: Simplify right side
    105,055.20x = 16,065,597,335.04
  5. Step 5: Solve for x
    x = 16,065,597,335.04/105,055.20
  6. Step 6: Final answer
    x = 152,925.29

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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.