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Finding the Fourth Proportional to 77,970.72, 107,571.60 and 44,417.28

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Solution

The fourth proportional to 77,970.72, 107,571.60 and 44,417.28 is: 61,279.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,970.72 : 107,571.60 = 44,417.28 : x
  2. Step 2: Convert to fraction form
    77,970.72/107,571.60 = 44,417.28/x
  3. Step 3: Cross multiply
    77,970.72x = 107,571.60 × 44,417.28
  4. Step 4: Simplify right side
    77,970.72x = 4,778,037,877.25
  5. Step 5: Solve for x
    x = 4,778,037,877.25/77,970.72
  6. Step 6: Final answer
    x = 61,279.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.