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Finding the Fourth Proportional to 145,422.40, 218,090.40 and 56,624.80

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Solution

The fourth proportional to 145,422.40, 218,090.40 and 56,624.80 is: 84,920.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,422.40 : 218,090.40 = 56,624.80 : x
  2. Step 2: Convert to fraction form
    145,422.40/218,090.40 = 56,624.80/x
  3. Step 3: Cross multiply
    145,422.40x = 218,090.40 × 56,624.80
  4. Step 4: Simplify right side
    145,422.40x = 12,349,325,281.92
  5. Step 5: Solve for x
    x = 12,349,325,281.92/145,422.40
  6. Step 6: Final answer
    x = 84,920.38

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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.