Home / 91,979.20-137,968.80-60,486.40

Finding the Fourth Proportional to 91,979.20, 137,968.80 and 60,486.40

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Solution

The fourth proportional to 91,979.20, 137,968.80 and 60,486.40 is: 90,729.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,979.20 : 137,968.80 = 60,486.40 : x
  2. Step 2: Convert to fraction form
    91,979.20/137,968.80 = 60,486.40/x
  3. Step 3: Cross multiply
    91,979.20x = 137,968.80 × 60,486.40
  4. Step 4: Simplify right side
    91,979.20x = 8,345,236,024.32
  5. Step 5: Solve for x
    x = 8,345,236,024.32/91,979.20
  6. Step 6: Final answer
    x = 90,729.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.