Finding the Fourth Proportional to 261,391,984.48, 392,130,567.58 and 77,178,082.06
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Solution
The fourth proportional to 261,391,984.48, 392,130,567.58 and 77,178,082.06 is: 115,779,698.38
Step by Step Solution
- Step 1: Write the proportion equation
261,391,984.48 : 392,130,567.58 = 77,178,082.06 : x - Step 2: Convert to fraction form
261,391,984.48/392,130,567.58 = 77,178,082.06/x - Step 3: Cross multiply
261,391,984.48x = 392,130,567.58 × 77,178,082.06 - Step 4: Simplify right side
261,391,984.48x = 30,263,885,122,923,616 - Step 5: Solve for x
x = 30,263,885,122,923,616/261,391,984.48 - Step 6: Final answer
x = 115,779,698.38
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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.