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Finding the Fourth Proportional to 145,479.80, 218,219.72 and 40,298.77

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Solution

The fourth proportional to 145,479.80, 218,219.72 and 40,298.77 is: 60,448.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,479.80 : 218,219.72 = 40,298.77 : x
  2. Step 2: Convert to fraction form
    145,479.80/218,219.72 = 40,298.77/x
  3. Step 3: Cross multiply
    145,479.80x = 218,219.72 × 40,298.77
  4. Step 4: Simplify right side
    145,479.80x = 8,793,985,376.22
  5. Step 5: Solve for x
    x = 8,793,985,376.22/145,479.80
  6. Step 6: Final answer
    x = 60,448.16

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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.