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Finding the Fourth Proportional to 138,870.40, 207,779.10 and 92,214.40

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Solution

The fourth proportional to 138,870.40, 207,779.10 and 92,214.40 is: 137,971.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,870.40 : 207,779.10 = 92,214.40 : x
  2. Step 2: Convert to fraction form
    138,870.40/207,779.10 = 92,214.40/x
  3. Step 3: Cross multiply
    138,870.40x = 207,779.10 × 92,214.40
  4. Step 4: Simplify right side
    138,870.40x = 19,160,225,039.04
  5. Step 5: Solve for x
    x = 19,160,225,039.04/138,870.40
  6. Step 6: Final answer
    x = 137,971.99

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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.