Home / 78,000.03-107,639.63-42,189.95

Finding the Fourth Proportional to 78,000.03, 107,639.63 and 42,189.95

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Solution

The fourth proportional to 78,000.03, 107,639.63 and 42,189.95 is: 58,221.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,000.03 : 107,639.63 = 42,189.95 : x
  2. Step 2: Convert to fraction form
    78,000.03/107,639.63 = 42,189.95/x
  3. Step 3: Cross multiply
    78,000.03x = 107,639.63 × 42,189.95
  4. Step 4: Simplify right side
    78,000.03x = 4,541,310,455.93
  5. Step 5: Solve for x
    x = 4,541,310,455.93/78,000.03
  6. Step 6: Final answer
    x = 58,221.91

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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.