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Finding the Fourth Proportional to 112,477.70, 168,781.35 and 42,407.30

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Solution

The fourth proportional to 112,477.70, 168,781.35 and 42,407.30 is: 63,635.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,477.70 : 168,781.35 = 42,407.30 : x
  2. Step 2: Convert to fraction form
    112,477.70/168,781.35 = 42,407.30/x
  3. Step 3: Cross multiply
    112,477.70x = 168,781.35 × 42,407.30
  4. Step 4: Simplify right side
    112,477.70x = 7,157,561,343.86
  5. Step 5: Solve for x
    x = 7,157,561,343.86/112,477.70
  6. Step 6: Final answer
    x = 63,635.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.