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Finding the Fourth Proportional to 219,878.06, 303,621.10 and 138,342.25

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Solution

The fourth proportional to 219,878.06, 303,621.10 and 138,342.25 is: 191,031.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,878.06 : 303,621.10 = 138,342.25 : x
  2. Step 2: Convert to fraction form
    219,878.06/303,621.10 = 138,342.25/x
  3. Step 3: Cross multiply
    219,878.06x = 303,621.10 × 138,342.25
  4. Step 4: Simplify right side
    219,878.06x = 42,003,626,155.15
  5. Step 5: Solve for x
    x = 42,003,626,155.15/219,878.06
  6. Step 6: Final answer
    x = 191,031.46

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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.