Finding the Fourth Proportional to 147,711,931.56, 203,831,790.66 and 81,631,639.08
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Solution
The fourth proportional to 147,711,931.56, 203,831,790.66 and 81,631,639.08 is: 112,645,762.55
Step by Step Solution
- Step 1: Write the proportion equation
147,711,931.56 : 203,831,790.66 = 81,631,639.08 : x - Step 2: Convert to fraction form
147,711,931.56/203,831,790.66 = 81,631,639.08/x - Step 3: Cross multiply
147,711,931.56x = 203,831,790.66 × 81,631,639.08 - Step 4: Simplify right side
147,711,931.56x = 16,639,123,168,187,234 - Step 5: Solve for x
x = 16,639,123,168,187,234/147,711,931.56 - Step 6: Final answer
x = 112,645,762.55
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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.