Finding the Fourth Proportional to 168,143,929.18, 231,832,472.93 and 138,270,178.95
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Solution
The fourth proportional to 168,143,929.18, 231,832,472.93 and 138,270,178.95 is: 190,643,323.70
Step by Step Solution
- Step 1: Write the proportion equation
168,143,929.18 : 231,832,472.93 = 138,270,178.95 : x - Step 2: Convert to fraction form
168,143,929.18/231,832,472.93 = 138,270,178.95/x - Step 3: Cross multiply
168,143,929.18x = 231,832,472.93 × 138,270,178.95 - Step 4: Simplify right side
168,143,929.18x = 32,055,517,518,452,128 - Step 5: Solve for x
x = 32,055,517,518,452,128/168,143,929.18 - Step 6: Final answer
x = 190,643,323.70
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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.