Home / 83,931.19-115,821.40-45,690.79

Finding the Fourth Proportional to 83,931.19, 115,821.40 and 45,690.79

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Solution

The fourth proportional to 83,931.19, 115,821.40 and 45,690.79 is: 63,051.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,931.19 : 115,821.40 = 45,690.79 : x
  2. Step 2: Convert to fraction form
    83,931.19/115,821.40 = 45,690.79/x
  3. Step 3: Cross multiply
    83,931.19x = 115,821.40 × 45,690.79
  4. Step 4: Simplify right side
    83,931.19x = 5,291,971,264.91
  5. Step 5: Solve for x
    x = 5,291,971,264.91/83,931.19
  6. Step 6: Final answer
    x = 63,051.31

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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.