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Finding the Fourth Proportional to 52,603.20, 78,866.40 and 21,422.40

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Solution

The fourth proportional to 52,603.20, 78,866.40 and 21,422.40 is: 32,117.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,603.20 : 78,866.40 = 21,422.40 : x
  2. Step 2: Convert to fraction form
    52,603.20/78,866.40 = 21,422.40/x
  3. Step 3: Cross multiply
    52,603.20x = 78,866.40 × 21,422.40
  4. Step 4: Simplify right side
    52,603.20x = 1,689,507,567.36
  5. Step 5: Solve for x
    x = 1,689,507,567.36/52,603.20
  6. Step 6: Final answer
    x = 32,117.96

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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.