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Finding the Fourth Proportional to 218,688.40, 328,032.60 and 60,941.20

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Solution

The fourth proportional to 218,688.40, 328,032.60 and 60,941.20 is: 91,411.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,688.40 : 328,032.60 = 60,941.20 : x
  2. Step 2: Convert to fraction form
    218,688.40/328,032.60 = 60,941.20/x
  3. Step 3: Cross multiply
    218,688.40x = 328,032.60 × 60,941.20
  4. Step 4: Simplify right side
    218,688.40x = 19,990,700,283.12
  5. Step 5: Solve for x
    x = 19,990,700,283.12/218,688.40
  6. Step 6: Final answer
    x = 91,411.80

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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.