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Finding the Fourth Proportional to 142,607.95, 196,737.19 and 85,987.87

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Solution

The fourth proportional to 142,607.95, 196,737.19 and 85,987.87 is: 118,626.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,607.95 : 196,737.19 = 85,987.87 : x
  2. Step 2: Convert to fraction form
    142,607.95/196,737.19 = 85,987.87/x
  3. Step 3: Cross multiply
    142,607.95x = 196,737.19 × 85,987.87
  4. Step 4: Simplify right side
    142,607.95x = 16,917,011,917.89
  5. Step 5: Solve for x
    x = 16,917,011,917.89/142,607.95
  6. Step 6: Final answer
    x = 118,626.01

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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.