Finding the Fourth Proportional to 429,031,872.65, 643,553,787.69 and 122,323,985.53
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Solution
The fourth proportional to 429,031,872.65, 643,553,787.69 and 122,323,985.53 is: 183,487,682.92
Step by Step Solution
- Step 1: Write the proportion equation
429,031,872.65 : 643,553,787.69 = 122,323,985.53 : x - Step 2: Convert to fraction form
429,031,872.65/643,553,787.69 = 122,323,985.53/x - Step 3: Cross multiply
429,031,872.65x = 643,553,787.69 × 122,323,985.53 - Step 4: Simplify right side
429,031,872.65x = 78,722,064,211,559,376 - Step 5: Solve for x
x = 78,722,064,211,559,376/429,031,872.65 - Step 6: Final answer
x = 183,487,682.92
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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.