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Finding the Fourth Proportional to 86,740.80, 121,281.60 and 86,740.80

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Solution

The fourth proportional to 86,740.80, 121,281.60 and 86,740.80 is: 121,281.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,740.80 : 121,281.60 = 86,740.80 : x
  2. Step 2: Convert to fraction form
    86,740.80/121,281.60 = 86,740.80/x
  3. Step 3: Cross multiply
    86,740.80x = 121,281.60 × 86,740.80
  4. Step 4: Simplify right side
    86,740.80x = 10,520,063,009.28
  5. Step 5: Solve for x
    x = 10,520,063,009.28/86,740.80
  6. Step 6: Final answer
    x = 121,281.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.