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Finding the Fourth Proportional to 145,955.40, 218,447.10 and 105,860.40

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Solution

The fourth proportional to 145,955.40, 218,447.10 and 105,860.40 is: 158,438.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,955.40 : 218,447.10 = 105,860.40 : x
  2. Step 2: Convert to fraction form
    145,955.40/218,447.10 = 105,860.40/x
  3. Step 3: Cross multiply
    145,955.40x = 218,447.10 × 105,860.40
  4. Step 4: Simplify right side
    145,955.40x = 23,124,897,384.84
  5. Step 5: Solve for x
    x = 23,124,897,384.84/145,955.40
  6. Step 6: Final answer
    x = 158,438.11

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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.