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Finding the Fourth Proportional to 61,783.51, 85,270.34 and 39,124.57

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Solution

The fourth proportional to 61,783.51, 85,270.34 and 39,124.57 is: 53,997.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,783.51 : 85,270.34 = 39,124.57 : x
  2. Step 2: Convert to fraction form
    61,783.51/85,270.34 = 39,124.57/x
  3. Step 3: Cross multiply
    61,783.51x = 85,270.34 × 39,124.57
  4. Step 4: Simplify right side
    61,783.51x = 3,336,165,386.25
  5. Step 5: Solve for x
    x = 3,336,165,386.25/61,783.51
  6. Step 6: Final answer
    x = 53,997.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.