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Finding the Fourth Proportional to 145,748.98, 218,129.66 and 89,624.64

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Solution

The fourth proportional to 145,748.98, 218,129.66 and 89,624.64 is: 134,133.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,748.98 : 218,129.66 = 89,624.64 : x
  2. Step 2: Convert to fraction form
    145,748.98/218,129.66 = 89,624.64/x
  3. Step 3: Cross multiply
    145,748.98x = 218,129.66 × 89,624.64
  4. Step 4: Simplify right side
    145,748.98x = 19,549,792,250.82
  5. Step 5: Solve for x
    x = 19,549,792,250.82/145,748.98
  6. Step 6: Final answer
    x = 134,133.30

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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.