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Finding the Fourth Proportional to 119,421.40, 164,798.04 and 65,706.40

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Solution

The fourth proportional to 119,421.40, 164,798.04 and 65,706.40 is: 90,672.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,421.40 : 164,798.04 = 65,706.40 : x
  2. Step 2: Convert to fraction form
    119,421.40/164,798.04 = 65,706.40/x
  3. Step 3: Cross multiply
    119,421.40x = 164,798.04 × 65,706.40
  4. Step 4: Simplify right side
    119,421.40x = 10,828,285,935.46
  5. Step 5: Solve for x
    x = 10,828,285,935.46/119,421.40
  6. Step 6: Final answer
    x = 90,672.91

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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.