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Finding the Fourth Proportional to 118,221.50, 163,123.34 and 70,479.30

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Solution

The fourth proportional to 118,221.50, 163,123.34 and 70,479.30 is: 97,248.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,221.50 : 163,123.34 = 70,479.30 : x
  2. Step 2: Convert to fraction form
    118,221.50/163,123.34 = 70,479.30/x
  3. Step 3: Cross multiply
    118,221.50x = 163,123.34 × 70,479.30
  4. Step 4: Simplify right side
    118,221.50x = 11,496,818,816.86
  5. Step 5: Solve for x
    x = 11,496,818,816.86/118,221.50
  6. Step 6: Final answer
    x = 97,248.12

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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.