Home / 78,518.08-108,355.74-42,708.94

Finding the Fourth Proportional to 78,518.08, 108,355.74 and 42,708.94

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Solution

The fourth proportional to 78,518.08, 108,355.74 and 42,708.94 is: 58,938.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,518.08 : 108,355.74 = 42,708.94 : x
  2. Step 2: Convert to fraction form
    78,518.08/108,355.74 = 42,708.94/x
  3. Step 3: Cross multiply
    78,518.08x = 108,355.74 × 42,708.94
  4. Step 4: Simplify right side
    78,518.08x = 4,627,758,798.32
  5. Step 5: Solve for x
    x = 4,627,758,798.32/78,518.08
  6. Step 6: Final answer
    x = 58,938.77

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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.