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Finding the Fourth Proportional to 60,653.60, 90,980.40 and 21,206.60

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Solution

The fourth proportional to 60,653.60, 90,980.40 and 21,206.60 is: 31,809.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,653.60 : 90,980.40 = 21,206.60 : x
  2. Step 2: Convert to fraction form
    60,653.60/90,980.40 = 21,206.60/x
  3. Step 3: Cross multiply
    60,653.60x = 90,980.40 × 21,206.60
  4. Step 4: Simplify right side
    60,653.60x = 1,929,384,950.64
  5. Step 5: Solve for x
    x = 1,929,384,950.64/60,653.60
  6. Step 6: Final answer
    x = 31,809.90

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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.