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Finding the Fourth Proportional to 120,103.70, 180,155.55 and 61,054.70

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Solution

The fourth proportional to 120,103.70, 180,155.55 and 61,054.70 is: 91,582.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,103.70 : 180,155.55 = 61,054.70 : x
  2. Step 2: Convert to fraction form
    120,103.70/180,155.55 = 61,054.70/x
  3. Step 3: Cross multiply
    120,103.70x = 180,155.55 × 61,054.70
  4. Step 4: Simplify right side
    120,103.70x = 10,999,343,058.59
  5. Step 5: Solve for x
    x = 10,999,343,058.59/120,103.70
  6. Step 6: Final answer
    x = 91,582.05

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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.