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Finding the Fourth Proportional to 145,370.76, 218,140.74 and 61,124.82

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Solution

The fourth proportional to 145,370.76, 218,140.74 and 61,124.82 is: 91,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,370.76 : 218,140.74 = 61,124.82 : x
  2. Step 2: Convert to fraction form
    145,370.76/218,140.74 = 61,124.82/x
  3. Step 3: Cross multiply
    145,370.76x = 218,140.74 × 61,124.82
  4. Step 4: Simplify right side
    145,370.76x = 13,333,813,467.17
  5. Step 5: Solve for x
    x = 13,333,813,467.17/145,370.76
  6. Step 6: Final answer
    x = 91,722.80

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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.