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Finding the Fourth Proportional to 124,430.40, 186,386.40 and 103,694.40

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Solution

The fourth proportional to 124,430.40, 186,386.40 and 103,694.40 is: 155,325.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,430.40 : 186,386.40 = 103,694.40 : x
  2. Step 2: Convert to fraction form
    124,430.40/186,386.40 = 103,694.40/x
  3. Step 3: Cross multiply
    124,430.40x = 186,386.40 × 103,694.40
  4. Step 4: Simplify right side
    124,430.40x = 19,327,225,916.16
  5. Step 5: Solve for x
    x = 19,327,225,916.16/124,430.40
  6. Step 6: Final answer
    x = 155,325.60

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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.