Home / 78,320.69-108,079.66-42,509.94

Finding the Fourth Proportional to 78,320.69, 108,079.66 and 42,509.94

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Solution

The fourth proportional to 78,320.69, 108,079.66 and 42,509.94 is: 58,662.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,320.69 : 108,079.66 = 42,509.94 : x
  2. Step 2: Convert to fraction form
    78,320.69/108,079.66 = 42,509.94/x
  3. Step 3: Cross multiply
    78,320.69x = 108,079.66 × 42,509.94
  4. Step 4: Simplify right side
    78,320.69x = 4,594,459,861.82
  5. Step 5: Solve for x
    x = 4,594,459,861.82/78,320.69
  6. Step 6: Final answer
    x = 58,662.15

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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.