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Finding the Fourth Proportional to 61,972,978.72, 85,545,733.80 and 53,236,088.68

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Solution

The fourth proportional to 61,972,978.72, 85,545,733.80 and 53,236,088.68 is: 73,485,579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,972,978.72 : 85,545,733.80 = 53,236,088.68 : x
  2. Step 2: Convert to fraction form
    61,972,978.72/85,545,733.80 = 53,236,088.68/x
  3. Step 3: Cross multiply
    61,972,978.72x = 85,545,733.80 × 53,236,088.68
  4. Step 4: Simplify right side
    61,972,978.72x = 4,554,120,270,772,473
  5. Step 5: Solve for x
    x = 4,554,120,270,772,473/61,972,978.72
  6. Step 6: Final answer
    x = 73,485,579.76

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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.