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Finding the Fourth Proportional to 118,667.70, 178,001.55 and 74,430.90

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Solution

The fourth proportional to 118,667.70, 178,001.55 and 74,430.90 is: 111,646.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,667.70 : 178,001.55 = 74,430.90 : x
  2. Step 2: Convert to fraction form
    118,667.70/178,001.55 = 74,430.90/x
  3. Step 3: Cross multiply
    118,667.70x = 178,001.55 × 74,430.90
  4. Step 4: Simplify right side
    118,667.70x = 13,248,815,567.90
  5. Step 5: Solve for x
    x = 13,248,815,567.90/118,667.70
  6. Step 6: Final answer
    x = 111,646.35

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1.5x scale

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.