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Finding the Fourth Proportional to 452,421.96, 678,665.60 and 136,903.72

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Solution

The fourth proportional to 452,421.96, 678,665.60 and 136,903.72 is: 205,365.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,421.96 : 678,665.60 = 136,903.72 : x
  2. Step 2: Convert to fraction form
    452,421.96/678,665.60 = 136,903.72/x
  3. Step 3: Cross multiply
    452,421.96x = 678,665.60 × 136,903.72
  4. Step 4: Simplify right side
    452,421.96x = 92,911,845,276.03
  5. Step 5: Solve for x
    x = 92,911,845,276.03/452,421.96
  6. Step 6: Final answer
    x = 205,365.46

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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.