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Finding the Fourth Proportional to 118,537,978.40, 163,607,822.24 and 72,143,174.24

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Solution

The fourth proportional to 118,537,978.40, 163,607,822.24 and 72,143,174.24 is: 99,573,046.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,537,978.40 : 163,607,822.24 = 72,143,174.24 : x
  2. Step 2: Convert to fraction form
    118,537,978.40/163,607,822.24 = 72,143,174.24/x
  3. Step 3: Cross multiply
    118,537,978.40x = 163,607,822.24 × 72,143,174.24
  4. Step 4: Simplify right side
    118,537,978.40x = 11,803,187,626,887,266
  5. Step 5: Solve for x
    x = 11,803,187,626,887,266/118,537,978.40
  6. Step 6: Final answer
    x = 99,573,046.43

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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.