Finding the Fourth Proportional to 105,220,987.80, 157,831,481.70 and 86,325,307.80
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Solution
The fourth proportional to 105,220,987.80, 157,831,481.70 and 86,325,307.80 is: 129,487,961.70
Step by Step Solution
- Step 1: Write the proportion equation
105,220,987.80 : 157,831,481.70 = 86,325,307.80 : x - Step 2: Convert to fraction form
105,220,987.80/157,831,481.70 = 86,325,307.80/x - Step 3: Cross multiply
105,220,987.80x = 157,831,481.70 × 86,325,307.80 - Step 4: Simplify right side
105,220,987.80x = 13,624,851,238,282,566 - Step 5: Solve for x
x = 13,624,851,238,282,566/105,220,987.80 - Step 6: Final answer
x = 129,487,961.70
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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.