Home / 78,885.15-108,861.50-43,075.20

Finding the Fourth Proportional to 78,885.15, 108,861.50 and 43,075.20

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Solution

The fourth proportional to 78,885.15, 108,861.50 and 43,075.20 is: 59,443.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,885.15 : 108,861.50 = 43,075.20 : x
  2. Step 2: Convert to fraction form
    78,885.15/108,861.50 = 43,075.20/x
  3. Step 3: Cross multiply
    78,885.15x = 108,861.50 × 43,075.20
  4. Step 4: Simplify right side
    78,885.15x = 4,689,230,884.80
  5. Step 5: Solve for x
    x = 4,689,230,884.80/78,885.15
  6. Step 6: Final answer
    x = 59,443.77

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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.