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Finding the Fourth Proportional to 55,980.71, 77,253.44 and 30,487.11

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Solution

The fourth proportional to 55,980.71, 77,253.44 and 30,487.11 is: 42,072.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,980.71 : 77,253.44 = 30,487.11 : x
  2. Step 2: Convert to fraction form
    55,980.71/77,253.44 = 30,487.11/x
  3. Step 3: Cross multiply
    55,980.71x = 77,253.44 × 30,487.11
  4. Step 4: Simplify right side
    55,980.71x = 2,355,233,970.72
  5. Step 5: Solve for x
    x = 2,355,233,970.72/55,980.71
  6. Step 6: Final answer
    x = 42,072.25

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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.