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Finding the Fourth Proportional to 103,689.64, 143,103.18 and 58,368.88

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Solution

The fourth proportional to 103,689.64, 143,103.18 and 58,368.88 is: 80,555.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.64 : 143,103.18 = 58,368.88 : x
  2. Step 2: Convert to fraction form
    103,689.64/143,103.18 = 58,368.88/x
  3. Step 3: Cross multiply
    103,689.64x = 143,103.18 × 58,368.88
  4. Step 4: Simplify right side
    103,689.64x = 8,352,772,341.04
  5. Step 5: Solve for x
    x = 8,352,772,341.04/103,689.64
  6. Step 6: Final answer
    x = 80,555.51

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1.5x scale

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.