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Finding the Fourth Proportional to 143,927.40, 215,615.70 and 77,345.40

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Solution

The fourth proportional to 143,927.40, 215,615.70 and 77,345.40 is: 115,870.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,927.40 : 215,615.70 = 77,345.40 : x
  2. Step 2: Convert to fraction form
    143,927.40/215,615.70 = 77,345.40/x
  3. Step 3: Cross multiply
    143,927.40x = 215,615.70 × 77,345.40
  4. Step 4: Simplify right side
    143,927.40x = 16,676,882,562.78
  5. Step 5: Solve for x
    x = 16,676,882,562.78/143,927.40
  6. Step 6: Final answer
    x = 115,870.10

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1.5x scale

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.