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Finding the Fourth Proportional to 172,641.40, 258,962.10 and 102,599.80

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Solution

The fourth proportional to 172,641.40, 258,962.10 and 102,599.80 is: 153,899.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,641.40 : 258,962.10 = 102,599.80 : x
  2. Step 2: Convert to fraction form
    172,641.40/258,962.10 = 102,599.80/x
  3. Step 3: Cross multiply
    172,641.40x = 258,962.10 × 102,599.80
  4. Step 4: Simplify right side
    172,641.40x = 26,569,459,667.58
  5. Step 5: Solve for x
    x = 26,569,459,667.58/172,641.40
  6. Step 6: Final answer
    x = 153,899.70

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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.