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Finding the Fourth Proportional to 145,412.60, 218,003.70 and 79,748.60

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Solution

The fourth proportional to 145,412.60, 218,003.70 and 79,748.60 is: 119,559.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,412.60 : 218,003.70 = 79,748.60 : x
  2. Step 2: Convert to fraction form
    145,412.60/218,003.70 = 79,748.60/x
  3. Step 3: Cross multiply
    145,412.60x = 218,003.70 × 79,748.60
  4. Step 4: Simplify right side
    145,412.60x = 17,385,489,869.82
  5. Step 5: Solve for x
    x = 17,385,489,869.82/145,412.60
  6. Step 6: Final answer
    x = 119,559.72

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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.