Home / 78,000.12-107,639.76-42,190.02

Finding the Fourth Proportional to 78,000.12, 107,639.76 and 42,190.02

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Solution

The fourth proportional to 78,000.12, 107,639.76 and 42,190.02 is: 58,222.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,000.12 : 107,639.76 = 42,190.02 : x
  2. Step 2: Convert to fraction form
    78,000.12/107,639.76 = 42,190.02/x
  3. Step 3: Cross multiply
    78,000.12x = 107,639.76 × 42,190.02
  4. Step 4: Simplify right side
    78,000.12x = 4,541,323,627.20
  5. Step 5: Solve for x
    x = 4,541,323,627.20/78,000.12
  6. Step 6: Final answer
    x = 58,222.01

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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.