Home / 78,330.21-108,097.66-42,520.23

Finding the Fourth Proportional to 78,330.21, 108,097.66 and 42,520.23

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Solution

The fourth proportional to 78,330.21, 108,097.66 and 42,520.23 is: 58,678.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,330.21 : 108,097.66 = 42,520.23 : x
  2. Step 2: Convert to fraction form
    78,330.21/108,097.66 = 42,520.23/x
  3. Step 3: Cross multiply
    78,330.21x = 108,097.66 × 42,520.23
  4. Step 4: Simplify right side
    78,330.21x = 4,596,337,365.66
  5. Step 5: Solve for x
    x = 4,596,337,365.66/78,330.21
  6. Step 6: Final answer
    x = 58,678.99

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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.