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Finding the Fourth Proportional to 98,671.34, 136,120.29 and 64,670.78

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Solution

The fourth proportional to 98,671.34, 136,120.29 and 64,670.78 is: 89,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,671.34 : 136,120.29 = 64,670.78 : x
  2. Step 2: Convert to fraction form
    98,671.34/136,120.29 = 64,670.78/x
  3. Step 3: Cross multiply
    98,671.34x = 136,120.29 × 64,670.78
  4. Step 4: Simplify right side
    98,671.34x = 8,803,005,328.13
  5. Step 5: Solve for x
    x = 8,803,005,328.13/98,671.34
  6. Step 6: Final answer
    x = 89,215.42

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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.