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Finding the Fourth Proportional to 228,335.16, 342,417.78 and 78,533.40

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Solution

The fourth proportional to 228,335.16, 342,417.78 and 78,533.40 is: 117,770.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,335.16 : 342,417.78 = 78,533.40 : x
  2. Step 2: Convert to fraction form
    228,335.16/342,417.78 = 78,533.40/x
  3. Step 3: Cross multiply
    228,335.16x = 342,417.78 × 78,533.40
  4. Step 4: Simplify right side
    228,335.16x = 26,891,232,483.85
  5. Step 5: Solve for x
    x = 26,891,232,483.85/228,335.16
  6. Step 6: Final answer
    x = 117,770.88

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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.