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Finding the Fourth Proportional to 66,430,240.80, 99,645,361.20 and 40,602,208.20

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Solution

The fourth proportional to 66,430,240.80, 99,645,361.20 and 40,602,208.20 is: 60,903,312.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,430,240.80 : 99,645,361.20 = 40,602,208.20 : x
  2. Step 2: Convert to fraction form
    66,430,240.80/99,645,361.20 = 40,602,208.20/x
  3. Step 3: Cross multiply
    66,430,240.80x = 99,645,361.20 × 40,602,208.20
  4. Step 4: Simplify right side
    66,430,240.80x = 4,045,821,701,606,602.50
  5. Step 5: Solve for x
    x = 4,045,821,701,606,602.50/66,430,240.80
  6. Step 6: Final answer
    x = 60,903,312.30

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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.