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Finding the Fourth Proportional to 89,689.80, 134,534.70 and 56,512.20

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Solution

The fourth proportional to 89,689.80, 134,534.70 and 56,512.20 is: 84,768.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,689.80 : 134,534.70 = 56,512.20 : x
  2. Step 2: Convert to fraction form
    89,689.80/134,534.70 = 56,512.20/x
  3. Step 3: Cross multiply
    89,689.80x = 134,534.70 × 56,512.20
  4. Step 4: Simplify right side
    89,689.80x = 7,602,851,873.34
  5. Step 5: Solve for x
    x = 7,602,851,873.34/89,689.80
  6. Step 6: Final answer
    x = 84,768.30

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1.5x scale

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.