Finding the Fourth Proportional to 121,990.68, 168,315.15 and 70,295.07
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Solution
The fourth proportional to 121,990.68, 168,315.15 and 70,295.07 is: 96,988.76
Step by Step Solution
- Step 1: Write the proportion equation
121,990.68 : 168,315.15 = 70,295.07 : x - Step 2: Convert to fraction form
121,990.68/168,315.15 = 70,295.07/x - Step 3: Cross multiply
121,990.68x = 168,315.15 × 70,295.07 - Step 4: Simplify right side
121,990.68x = 11,831,725,251.31 - Step 5: Solve for x
x = 11,831,725,251.31/121,990.68 - Step 6: Final answer
x = 96,988.76
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1.5x scale
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.