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Finding the Fourth Proportional to 109,608.30, 164,412.45 and 76,430.70

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Solution

The fourth proportional to 109,608.30, 164,412.45 and 76,430.70 is: 114,646.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,608.30 : 164,412.45 = 76,430.70 : x
  2. Step 2: Convert to fraction form
    109,608.30/164,412.45 = 76,430.70/x
  3. Step 3: Cross multiply
    109,608.30x = 164,412.45 × 76,430.70
  4. Step 4: Simplify right side
    109,608.30x = 12,566,158,642.22
  5. Step 5: Solve for x
    x = 12,566,158,642.22/109,608.30
  6. Step 6: Final answer
    x = 114,646.05

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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.