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Finding the Fourth Proportional to 74,902,641.60, 112,353,962.40 and 21,049,953.60

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Solution

The fourth proportional to 74,902,641.60, 112,353,962.40 and 21,049,953.60 is: 31,574,930.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,902,641.60 : 112,353,962.40 = 21,049,953.60 : x
  2. Step 2: Convert to fraction form
    74,902,641.60/112,353,962.40 = 21,049,953.60/x
  3. Step 3: Cross multiply
    74,902,641.60x = 112,353,962.40 × 21,049,953.60
  4. Step 4: Simplify right side
    74,902,641.60x = 2,365,045,695,296,145
  5. Step 5: Solve for x
    x = 2,365,045,695,296,145/74,902,641.60
  6. Step 6: Final answer
    x = 31,574,930.40

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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.