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Finding the Fourth Proportional to 152,879.40, 210,975.64 and 84,900.76

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Solution

The fourth proportional to 152,879.40, 210,975.64 and 84,900.76 is: 117,164.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,879.40 : 210,975.64 = 84,900.76 : x
  2. Step 2: Convert to fraction form
    152,879.40/210,975.64 = 84,900.76/x
  3. Step 3: Cross multiply
    152,879.40x = 210,975.64 × 84,900.76
  4. Step 4: Simplify right side
    152,879.40x = 17,911,991,437.80
  5. Step 5: Solve for x
    x = 17,911,991,437.80/152,879.40
  6. Step 6: Final answer
    x = 117,164.19

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1.5x scale

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.