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Finding the Fourth Proportional to 60,692,540.80, 91,038,811.20 and 40,285,206.40

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Solution

The fourth proportional to 60,692,540.80, 91,038,811.20 and 40,285,206.40 is: 60,427,809.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,692,540.80 : 91,038,811.20 = 40,285,206.40 : x
  2. Step 2: Convert to fraction form
    60,692,540.80/91,038,811.20 = 40,285,206.40/x
  3. Step 3: Cross multiply
    60,692,540.80x = 91,038,811.20 × 40,285,206.40
  4. Step 4: Simplify right side
    60,692,540.80x = 3,667,517,299,602,631.50
  5. Step 5: Solve for x
    x = 3,667,517,299,602,631.50/60,692,540.80
  6. Step 6: Final answer
    x = 60,427,809.60

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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.