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Finding the Fourth Proportional to 172,909.58, 238,674.76 and 101,312.78

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Solution

The fourth proportional to 172,909.58, 238,674.76 and 101,312.78 is: 139,846.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,909.58 : 238,674.76 = 101,312.78 : x
  2. Step 2: Convert to fraction form
    172,909.58/238,674.76 = 101,312.78/x
  3. Step 3: Cross multiply
    172,909.58x = 238,674.76 × 101,312.78
  4. Step 4: Simplify right side
    172,909.58x = 24,180,803,451.43
  5. Step 5: Solve for x
    x = 24,180,803,451.43/172,909.58
  6. Step 6: Final answer
    x = 139,846.52

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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.