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Finding the Fourth Proportional to 171,854.60, 257,490.30 and 142,111.40

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Solution

The fourth proportional to 171,854.60, 257,490.30 and 142,111.40 is: 212,925.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,854.60 : 257,490.30 = 142,111.40 : x
  2. Step 2: Convert to fraction form
    171,854.60/257,490.30 = 142,111.40/x
  3. Step 3: Cross multiply
    171,854.60x = 257,490.30 × 142,111.40
  4. Step 4: Simplify right side
    171,854.60x = 36,592,307,019.42
  5. Step 5: Solve for x
    x = 36,592,307,019.42/171,854.60
  6. Step 6: Final answer
    x = 212,925.97

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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.