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Finding the Fourth Proportional to 70,861.60, 97,784.52 and 39,030.50

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Solution

The fourth proportional to 70,861.60, 97,784.52 and 39,030.50 is: 53,859.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,861.60 : 97,784.52 = 39,030.50 : x
  2. Step 2: Convert to fraction form
    70,861.60/97,784.52 = 39,030.50/x
  3. Step 3: Cross multiply
    70,861.60x = 97,784.52 × 39,030.50
  4. Step 4: Simplify right side
    70,861.60x = 3,816,578,707.86
  5. Step 5: Solve for x
    x = 3,816,578,707.86/70,861.60
  6. Step 6: Final answer
    x = 53,859.62

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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.