Finding the Fourth Proportional to 156,369,285.99, 215,786,744.55 and 86,753,172.21
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Solution
The fourth proportional to 156,369,285.99, 215,786,744.55 and 86,753,172.21 is: 119,717,785.32
Step by Step Solution
- Step 1: Write the proportion equation
156,369,285.99 : 215,786,744.55 = 86,753,172.21 : x - Step 2: Convert to fraction form
156,369,285.99/215,786,744.55 = 86,753,172.21/x - Step 3: Cross multiply
156,369,285.99x = 215,786,744.55 × 86,753,172.21 - Step 4: Simplify right side
156,369,285.99x = 18,720,184,610,581,428 - Step 5: Solve for x
x = 18,720,184,610,581,428/156,369,285.99 - Step 6: Final answer
x = 119,717,785.32
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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.