Finding the Fourth Proportional to 86,281,277.40, 129,421,916.10 and 76,875,427.80
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Solution
The fourth proportional to 86,281,277.40, 129,421,916.10 and 76,875,427.80 is: 115,313,141.70
Step by Step Solution
- Step 1: Write the proportion equation
86,281,277.40 : 129,421,916.10 = 76,875,427.80 : x - Step 2: Convert to fraction form
86,281,277.40/129,421,916.10 = 76,875,427.80/x - Step 3: Cross multiply
86,281,277.40x = 129,421,916.10 × 76,875,427.80 - Step 4: Simplify right side
86,281,277.40x = 9,949,365,166,883,206 - Step 5: Solve for x
x = 9,949,365,166,883,206/86,281,277.40 - Step 6: Final answer
x = 115,313,141.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.