Home / 85,638.03-128,269.80-43,445.40

Finding the Fourth Proportional to 85,638.03, 128,269.80 and 43,445.40

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Solution

The fourth proportional to 85,638.03, 128,269.80 and 43,445.40 is: 65,073.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,638.03 : 128,269.80 = 43,445.40 : x
  2. Step 2: Convert to fraction form
    85,638.03/128,269.80 = 43,445.40/x
  3. Step 3: Cross multiply
    85,638.03x = 128,269.80 × 43,445.40
  4. Step 4: Simplify right side
    85,638.03x = 5,572,732,768.92
  5. Step 5: Solve for x
    x = 5,572,732,768.92/85,638.03
  6. Step 6: Final answer
    x = 65,073.11

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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.