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Finding the Fourth Proportional to 78,330.59, 108,096.29 and 42,520.58

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Solution

The fourth proportional to 78,330.59, 108,096.29 and 42,520.58 is: 58,678.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,330.59 : 108,096.29 = 42,520.58 : x
  2. Step 2: Convert to fraction form
    78,330.59/108,096.29 = 42,520.58/x
  3. Step 3: Cross multiply
    78,330.59x = 108,096.29 × 42,520.58
  4. Step 4: Simplify right side
    78,330.59x = 4,596,316,193.56
  5. Step 5: Solve for x
    x = 4,596,316,193.56/78,330.59
  6. Step 6: Final answer
    x = 58,678.44

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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.