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Finding the Fourth Proportional to 121,510.60, 170,289.80 and 121,510.60

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Solution

The fourth proportional to 121,510.60, 170,289.80 and 121,510.60 is: 170,289.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,510.60 : 170,289.80 = 121,510.60 : x
  2. Step 2: Convert to fraction form
    121,510.60/170,289.80 = 121,510.60/x
  3. Step 3: Cross multiply
    121,510.60x = 170,289.80 × 121,510.60
  4. Step 4: Simplify right side
    121,510.60x = 20,692,015,771.88
  5. Step 5: Solve for x
    x = 20,692,015,771.88/121,510.60
  6. Step 6: Final answer
    x = 170,289.80

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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.