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Finding the Fourth Proportional to 51,477.60, 77,158.80 and 21,890.40

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Solution

The fourth proportional to 51,477.60, 77,158.80 and 21,890.40 is: 32,811.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,477.60 : 77,158.80 = 21,890.40 : x
  2. Step 2: Convert to fraction form
    51,477.60/77,158.80 = 21,890.40/x
  3. Step 3: Cross multiply
    51,477.60x = 77,158.80 × 21,890.40
  4. Step 4: Simplify right side
    51,477.60x = 1,689,036,995.52
  5. Step 5: Solve for x
    x = 1,689,036,995.52/51,477.60
  6. Step 6: Final answer
    x = 32,811.11

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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.