Finding the Fourth Proportional to 72,415,126.80, 108,748,661.40 and 38,402,902.80
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Solution
The fourth proportional to 72,415,126.80, 108,748,661.40 and 38,402,902.80 is: 57,671,158.75
Step by Step Solution
- Step 1: Write the proportion equation
72,415,126.80 : 108,748,661.40 = 38,402,902.80 : x - Step 2: Convert to fraction form
72,415,126.80/108,748,661.40 = 38,402,902.80/x - Step 3: Cross multiply
72,415,126.80x = 108,748,661.40 × 38,402,902.80 - Step 4: Simplify right side
72,415,126.80x = 4,176,264,273,374,312 - Step 5: Solve for x
x = 4,176,264,273,374,312/72,415,126.80 - Step 6: Final answer
x = 57,671,158.75
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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.