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Finding the Fourth Proportional to 143,956.80, 215,870.40 and 65,030.40

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Solution

The fourth proportional to 143,956.80, 215,870.40 and 65,030.40 is: 97,516.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,956.80 : 215,870.40 = 65,030.40 : x
  2. Step 2: Convert to fraction form
    143,956.80/215,870.40 = 65,030.40/x
  3. Step 3: Cross multiply
    143,956.80x = 215,870.40 × 65,030.40
  4. Step 4: Simplify right side
    143,956.80x = 14,038,138,460.16
  5. Step 5: Solve for x
    x = 14,038,138,460.16/143,956.80
  6. Step 6: Final answer
    x = 97,516.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.