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Finding the Fourth Proportional to 85,707.92, 128,526.35 and 32,390.69

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Solution

The fourth proportional to 85,707.92, 128,526.35 and 32,390.69 is: 48,572.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,707.92 : 128,526.35 = 32,390.69 : x
  2. Step 2: Convert to fraction form
    85,707.92/128,526.35 = 32,390.69/x
  3. Step 3: Cross multiply
    85,707.92x = 128,526.35 × 32,390.69
  4. Step 4: Simplify right side
    85,707.92x = 4,163,056,355.10
  5. Step 5: Solve for x
    x = 4,163,056,355.10/85,707.92
  6. Step 6: Final answer
    x = 48,572.60

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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.