Finding the Fourth Proportional to 122,417.28, 168,998.40 and 77,109.12
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Solution
The fourth proportional to 122,417.28, 168,998.40 and 77,109.12 is: 106,449.99
Step by Step Solution
- Step 1: Write the proportion equation
122,417.28 : 168,998.40 = 77,109.12 : x - Step 2: Convert to fraction form
122,417.28/168,998.40 = 77,109.12/x - Step 3: Cross multiply
122,417.28x = 168,998.40 × 77,109.12 - Step 4: Simplify right side
122,417.28x = 13,031,317,905.41 - Step 5: Solve for x
x = 13,031,317,905.41/122,417.28 - Step 6: Final answer
x = 106,449.99
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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.