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Finding the Fourth Proportional to 85,950.96, 128,971.80 and 46,500.72

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Solution

The fourth proportional to 85,950.96, 128,971.80 and 46,500.72 is: 69,775.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,950.96 : 128,971.80 = 46,500.72 : x
  2. Step 2: Convert to fraction form
    85,950.96/128,971.80 = 46,500.72/x
  3. Step 3: Cross multiply
    85,950.96x = 128,971.80 × 46,500.72
  4. Step 4: Simplify right side
    85,950.96x = 5,997,281,559.70
  5. Step 5: Solve for x
    x = 5,997,281,559.70/85,950.96
  6. Step 6: Final answer
    x = 69,775.62

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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.