Finding the Fourth Proportional to 85,776,266.70, 128,664,400.05 and 76,706,340.30
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Solution
The fourth proportional to 85,776,266.70, 128,664,400.05 and 76,706,340.30 is: 115,059,510.45
Step by Step Solution
- Step 1: Write the proportion equation
85,776,266.70 : 128,664,400.05 = 76,706,340.30 : x - Step 2: Convert to fraction form
85,776,266.70/128,664,400.05 = 76,706,340.30/x - Step 3: Cross multiply
85,776,266.70x = 128,664,400.05 × 76,706,340.30 - Step 4: Simplify right side
85,776,266.70x = 9,869,375,254,730,636 - Step 5: Solve for x
x = 9,869,375,254,730,636/85,776,266.70 - Step 6: Final answer
x = 115,059,510.45
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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.