Finding the Fourth Proportional to 115,210.79, 158,913.09 and 100,077.09
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Solution
The fourth proportional to 115,210.79, 158,913.09 and 100,077.09 is: 138,038.80
Step by Step Solution
- Step 1: Write the proportion equation
115,210.79 : 158,913.09 = 100,077.09 : x - Step 2: Convert to fraction form
115,210.79/158,913.09 = 100,077.09/x - Step 3: Cross multiply
115,210.79x = 158,913.09 × 100,077.09 - Step 4: Simplify right side
115,210.79x = 15,903,559,014.18 - Step 5: Solve for x
x = 15,903,559,014.18/115,210.79 - Step 6: Final answer
x = 138,038.80
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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.