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Finding the Fourth Proportional to 125,931.70, 188,897.55 and 118,714.60

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Solution

The fourth proportional to 125,931.70, 188,897.55 and 118,714.60 is: 178,071.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,931.70 : 188,897.55 = 118,714.60 : x
  2. Step 2: Convert to fraction form
    125,931.70/188,897.55 = 118,714.60/x
  3. Step 3: Cross multiply
    125,931.70x = 188,897.55 × 118,714.60
  4. Step 4: Simplify right side
    125,931.70x = 22,424,897,089.23
  5. Step 5: Solve for x
    x = 22,424,897,089.23/125,931.70
  6. Step 6: Final answer
    x = 178,071.90

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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.