Finding the Fourth Proportional to 91,357,478.20, 137,036,217.30 and 69,834,117.70
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Solution
The fourth proportional to 91,357,478.20, 137,036,217.30 and 69,834,117.70 is: 104,751,176.55
Step by Step Solution
- Step 1: Write the proportion equation
91,357,478.20 : 137,036,217.30 = 69,834,117.70 : x - Step 2: Convert to fraction form
91,357,478.20/137,036,217.30 = 69,834,117.70/x - Step 3: Cross multiply
91,357,478.20x = 137,036,217.30 × 69,834,117.70 - Step 4: Simplify right side
91,357,478.20x = 9,569,803,328,090,978 - Step 5: Solve for x
x = 9,569,803,328,090,978/91,357,478.20 - Step 6: Final answer
x = 104,751,176.55
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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.