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Finding the Fourth Proportional to 172,117.20, 257,955.88 and 138,852.93

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Solution

The fourth proportional to 172,117.20, 257,955.88 and 138,852.93 is: 208,101.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,117.20 : 257,955.88 = 138,852.93 : x
  2. Step 2: Convert to fraction form
    172,117.20/257,955.88 = 138,852.93/x
  3. Step 3: Cross multiply
    172,117.20x = 257,955.88 × 138,852.93
  4. Step 4: Simplify right side
    172,117.20x = 35,817,929,748.73
  5. Step 5: Solve for x
    x = 35,817,929,748.73/172,117.20
  6. Step 6: Final answer
    x = 208,101.98

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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.