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Finding the Fourth Proportional to 51,989.80, 78,019.30 and 28,303.32

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Solution

The fourth proportional to 51,989.80, 78,019.30 and 28,303.32 is: 42,473.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,989.80 : 78,019.30 = 28,303.32 : x
  2. Step 2: Convert to fraction form
    51,989.80/78,019.30 = 28,303.32/x
  3. Step 3: Cross multiply
    51,989.80x = 78,019.30 × 28,303.32
  4. Step 4: Simplify right side
    51,989.80x = 2,208,205,214.08
  5. Step 5: Solve for x
    x = 2,208,205,214.08/51,989.80
  6. Step 6: Final answer
    x = 42,473.82

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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.