Finding the Fourth Proportional to 100,984.93, 139,307.95 and 77,070.08
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Solution
The fourth proportional to 100,984.93, 139,307.95 and 77,070.08 is: 106,317.60
Step by Step Solution
- Step 1: Write the proportion equation
100,984.93 : 139,307.95 = 77,070.08 : x - Step 2: Convert to fraction form
100,984.93/139,307.95 = 77,070.08/x - Step 3: Cross multiply
100,984.93x = 139,307.95 × 77,070.08 - Step 4: Simplify right side
100,984.93x = 10,736,475,295.74 - Step 5: Solve for x
x = 10,736,475,295.74/100,984.93 - Step 6: Final answer
x = 106,317.60
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.