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Finding the Fourth Proportional to 145,814.40, 218,721.60 and 98,812.80

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Solution

The fourth proportional to 145,814.40, 218,721.60 and 98,812.80 is: 148,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,814.40 : 218,721.60 = 98,812.80 : x
  2. Step 2: Convert to fraction form
    145,814.40/218,721.60 = 98,812.80/x
  3. Step 3: Cross multiply
    145,814.40x = 218,721.60 × 98,812.80
  4. Step 4: Simplify right side
    145,814.40x = 21,612,493,716.48
  5. Step 5: Solve for x
    x = 21,612,493,716.48/145,814.40
  6. Step 6: Final answer
    x = 148,219.20

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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.