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Finding the Fourth Proportional to 142,810.56, 212,939.06 and 138,887.02

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Solution

The fourth proportional to 142,810.56, 212,939.06 and 138,887.02 is: 207,088.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,810.56 : 212,939.06 = 138,887.02 : x
  2. Step 2: Convert to fraction form
    142,810.56/212,939.06 = 138,887.02/x
  3. Step 3: Cross multiply
    142,810.56x = 212,939.06 × 138,887.02
  4. Step 4: Simplify right side
    142,810.56x = 29,574,471,485.00
  5. Step 5: Solve for x
    x = 29,574,471,485.00/142,810.56
  6. Step 6: Final answer
    x = 207,088.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.