Home / 105,455.57-145,528.68-57,708.93

Finding the Fourth Proportional to 105,455.57, 145,528.68 and 57,708.93

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Solution

The fourth proportional to 105,455.57, 145,528.68 and 57,708.93 is: 79,638.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,455.57 : 145,528.68 = 57,708.93 : x
  2. Step 2: Convert to fraction form
    105,455.57/145,528.68 = 57,708.93/x
  3. Step 3: Cross multiply
    105,455.57x = 145,528.68 × 57,708.93
  4. Step 4: Simplify right side
    105,455.57x = 8,398,304,407.11
  5. Step 5: Solve for x
    x = 8,398,304,407.11/105,455.57
  6. Step 6: Final answer
    x = 79,638.32

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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.