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Finding the Fourth Proportional to 55,972.80, 78,465.60 and 55,972.80

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Solution

The fourth proportional to 55,972.80, 78,465.60 and 55,972.80 is: 78,465.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,972.80 : 78,465.60 = 55,972.80 : x
  2. Step 2: Convert to fraction form
    55,972.80/78,465.60 = 55,972.80/x
  3. Step 3: Cross multiply
    55,972.80x = 78,465.60 × 55,972.80
  4. Step 4: Simplify right side
    55,972.80x = 4,391,939,335.68
  5. Step 5: Solve for x
    x = 4,391,939,335.68/55,972.80
  6. Step 6: Final answer
    x = 78,465.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.