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Finding the Fourth Proportional to 109,411.80, 164,117.70 and 70,013.40

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Solution

The fourth proportional to 109,411.80, 164,117.70 and 70,013.40 is: 105,020.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,411.80 : 164,117.70 = 70,013.40 : x
  2. Step 2: Convert to fraction form
    109,411.80/164,117.70 = 70,013.40/x
  3. Step 3: Cross multiply
    109,411.80x = 164,117.70 × 70,013.40
  4. Step 4: Simplify right side
    109,411.80x = 11,490,438,177.18
  5. Step 5: Solve for x
    x = 11,490,438,177.18/109,411.80
  6. Step 6: Final answer
    x = 105,020.10

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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.