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Finding the Fourth Proportional to 145,748.61, 218,129.09 and 89,624.26

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Solution

The fourth proportional to 145,748.61, 218,129.09 and 89,624.26 is: 134,132.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,748.61 : 218,129.09 = 89,624.26 : x
  2. Step 2: Convert to fraction form
    145,748.61/218,129.09 = 89,624.26/x
  3. Step 3: Cross multiply
    145,748.61x = 218,129.09 × 89,624.26
  4. Step 4: Simplify right side
    145,748.61x = 19,549,657,954.46
  5. Step 5: Solve for x
    x = 19,549,657,954.46/145,748.61
  6. Step 6: Final answer
    x = 134,132.72

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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.