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Finding the Fourth Proportional to 101,437.84, 139,991.08 and 56,726.16

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Solution

The fourth proportional to 101,437.84, 139,991.08 and 56,726.16 is: 78,285.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,437.84 : 139,991.08 = 56,726.16 : x
  2. Step 2: Convert to fraction form
    101,437.84/139,991.08 = 56,726.16/x
  3. Step 3: Cross multiply
    101,437.84x = 139,991.08 × 56,726.16
  4. Step 4: Simplify right side
    101,437.84x = 7,941,156,402.65
  5. Step 5: Solve for x
    x = 7,941,156,402.65/101,437.84
  6. Step 6: Final answer
    x = 78,285.94

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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.