Finding the Fourth Proportional to 128,611,427.84, 177,485,784 and 69,875,256.32
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Solution
The fourth proportional to 128,611,427.84, 177,485,784 and 69,875,256.32 is: 96,428,947.71
Step by Step Solution
- Step 1: Write the proportion equation
128,611,427.84 : 177,485,784 = 69,875,256.32 : x - Step 2: Convert to fraction form
128,611,427.84/177,485,784 = 69,875,256.32/x - Step 3: Cross multiply
128,611,427.84x = 177,485,784 × 69,875,256.32 - Step 4: Simplify right side
128,611,427.84x = 12,401,864,650,156,154 - Step 5: Solve for x
x = 12,401,864,650,156,154/128,611,427.84 - Step 6: Final answer
x = 96,428,947.71
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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.