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Finding the Fourth Proportional to 115,210.70, 158,971.50 and 64,212.26

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Solution

The fourth proportional to 115,210.70, 158,971.50 and 64,212.26 is: 88,602.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,210.70 : 158,971.50 = 64,212.26 : x
  2. Step 2: Convert to fraction form
    115,210.70/158,971.50 = 64,212.26/x
  3. Step 3: Cross multiply
    115,210.70x = 158,971.50 × 64,212.26
  4. Step 4: Simplify right side
    115,210.70x = 10,207,919,290.59
  5. Step 5: Solve for x
    x = 10,207,919,290.59/115,210.70
  6. Step 6: Final answer
    x = 88,602.18

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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.