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Finding the Fourth Proportional to 55,970.76, 77,240.66 and 30,477.88

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Solution

The fourth proportional to 55,970.76, 77,240.66 and 30,477.88 is: 42,060.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,970.76 : 77,240.66 = 30,477.88 : x
  2. Step 2: Convert to fraction form
    55,970.76/77,240.66 = 30,477.88/x
  3. Step 3: Cross multiply
    55,970.76x = 77,240.66 × 30,477.88
  4. Step 4: Simplify right side
    55,970.76x = 2,354,131,566.60
  5. Step 5: Solve for x
    x = 2,354,131,566.60/55,970.76
  6. Step 6: Final answer
    x = 42,060.03

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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.