Home / 257,145.60-385,718.40-70,157.10

Finding the Fourth Proportional to 257,145.60, 385,718.40 and 70,157.10

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Solution

The fourth proportional to 257,145.60, 385,718.40 and 70,157.10 is: 105,235.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,145.60 : 385,718.40 = 70,157.10 : x
  2. Step 2: Convert to fraction form
    257,145.60/385,718.40 = 70,157.10/x
  3. Step 3: Cross multiply
    257,145.60x = 385,718.40 × 70,157.10
  4. Step 4: Simplify right side
    257,145.60x = 27,060,884,360.64
  5. Step 5: Solve for x
    x = 27,060,884,360.64/257,145.60
  6. Step 6: Final answer
    x = 105,235.65

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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.