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Finding the Fourth Proportional to 70,709.96, 97,580.16 and 38,879.12

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Solution

The fourth proportional to 70,709.96, 97,580.16 and 38,879.12 is: 53,653.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,709.96 : 97,580.16 = 38,879.12 : x
  2. Step 2: Convert to fraction form
    70,709.96/97,580.16 = 38,879.12/x
  3. Step 3: Cross multiply
    70,709.96x = 97,580.16 × 38,879.12
  4. Step 4: Simplify right side
    70,709.96x = 3,793,830,750.26
  5. Step 5: Solve for x
    x = 3,793,830,750.26/70,709.96
  6. Step 6: Final answer
    x = 53,653.41

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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.