Home / 85,930.40-128,895.60-72,152.30

Finding the Fourth Proportional to 85,930.40, 128,895.60 and 72,152.30

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Solution

The fourth proportional to 85,930.40, 128,895.60 and 72,152.30 is: 108,228.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,930.40 : 128,895.60 = 72,152.30 : x
  2. Step 2: Convert to fraction form
    85,930.40/128,895.60 = 72,152.30/x
  3. Step 3: Cross multiply
    85,930.40x = 128,895.60 × 72,152.30
  4. Step 4: Simplify right side
    85,930.40x = 9,300,113,999.88
  5. Step 5: Solve for x
    x = 9,300,113,999.88/85,930.40
  6. Step 6: Final answer
    x = 108,228.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.