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Finding the Fourth Proportional to 152,307.70, 210,177.78 and 84,319.90

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Solution

The fourth proportional to 152,307.70, 210,177.78 and 84,319.90 is: 116,357.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,307.70 : 210,177.78 = 84,319.90 : x
  2. Step 2: Convert to fraction form
    152,307.70/210,177.78 = 84,319.90/x
  3. Step 3: Cross multiply
    152,307.70x = 210,177.78 × 84,319.90
  4. Step 4: Simplify right side
    152,307.70x = 17,722,169,391.82
  5. Step 5: Solve for x
    x = 17,722,169,391.82/152,307.70
  6. Step 6: Final answer
    x = 116,357.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.