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Finding the Fourth Proportional to 118,888.42, 178,330.86 and 28,931.98

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Solution

The fourth proportional to 118,888.42, 178,330.86 and 28,931.98 is: 43,397.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,888.42 : 178,330.86 = 28,931.98 : x
  2. Step 2: Convert to fraction form
    118,888.42/178,330.86 = 28,931.98/x
  3. Step 3: Cross multiply
    118,888.42x = 178,330.86 × 28,931.98
  4. Step 4: Simplify right side
    118,888.42x = 5,159,464,874.90
  5. Step 5: Solve for x
    x = 5,159,464,874.90/118,888.42
  6. Step 6: Final answer
    x = 43,397.54

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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.