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Finding the Fourth Proportional to 172,056.96, 257,985 and 66,752.91

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Solution

The fourth proportional to 172,056.96, 257,985 and 66,752.91 is: 100,090.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,056.96 : 257,985 = 66,752.91 : x
  2. Step 2: Convert to fraction form
    172,056.96/257,985 = 66,752.91/x
  3. Step 3: Cross multiply
    172,056.96x = 257,985 × 66,752.91
  4. Step 4: Simplify right side
    172,056.96x = 17,221,249,486.35
  5. Step 5: Solve for x
    x = 17,221,249,486.35/172,056.96
  6. Step 6: Final answer
    x = 100,090.40

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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.