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Finding the Fourth Proportional to 56,904.40, 85,356.60 and 39,189.70

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Solution

The fourth proportional to 56,904.40, 85,356.60 and 39,189.70 is: 58,784.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,904.40 : 85,356.60 = 39,189.70 : x
  2. Step 2: Convert to fraction form
    56,904.40/85,356.60 = 39,189.70/x
  3. Step 3: Cross multiply
    56,904.40x = 85,356.60 × 39,189.70
  4. Step 4: Simplify right side
    56,904.40x = 3,345,099,547.02
  5. Step 5: Solve for x
    x = 3,345,099,547.02/56,904.40
  6. Step 6: Final answer
    x = 58,784.55

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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.