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Finding the Fourth Proportional to 70,909.32, 97,811.52 and 42,209.76

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Solution

The fourth proportional to 70,909.32, 97,811.52 and 42,209.76 is: 58,223.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,909.32 : 97,811.52 = 42,209.76 : x
  2. Step 2: Convert to fraction form
    70,909.32/97,811.52 = 42,209.76/x
  3. Step 3: Cross multiply
    70,909.32x = 97,811.52 × 42,209.76
  4. Step 4: Simplify right side
    70,909.32x = 4,128,600,784.44
  5. Step 5: Solve for x
    x = 4,128,600,784.44/70,909.32
  6. Step 6: Final answer
    x = 58,223.67

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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.