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Finding the Fourth Proportional to 153,316.80, 211,572 and 86,235.84

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Solution

The fourth proportional to 153,316.80, 211,572 and 86,235.84 is: 119,002.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,316.80 : 211,572 = 86,235.84 : x
  2. Step 2: Convert to fraction form
    153,316.80/211,572 = 86,235.84/x
  3. Step 3: Cross multiply
    153,316.80x = 211,572 × 86,235.84
  4. Step 4: Simplify right side
    153,316.80x = 18,245,089,140.48
  5. Step 5: Solve for x
    x = 18,245,089,140.48/153,316.80
  6. Step 6: Final answer
    x = 119,002.54

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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.