Finding the Fourth Proportional to 158,291,803.55, 218,442,709.68 and 87,731,969.18
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Solution
The fourth proportional to 158,291,803.55, 218,442,709.68 and 87,731,969.18 is: 121,070,128.99
Step by Step Solution
- Step 1: Write the proportion equation
158,291,803.55 : 218,442,709.68 = 87,731,969.18 : x - Step 2: Convert to fraction form
158,291,803.55/218,442,709.68 = 87,731,969.18/x - Step 3: Cross multiply
158,291,803.55x = 218,442,709.68 × 87,731,969.18 - Step 4: Simplify right side
158,291,803.55x = 19,164,409,073,048,980 - Step 5: Solve for x
x = 19,164,409,073,048,980/158,291,803.55 - Step 6: Final answer
x = 121,070,128.99
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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.