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Finding the Fourth Proportional to 257,590.95, 386,421.60 and 89,066.03

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Solution

The fourth proportional to 257,590.95, 386,421.60 and 89,066.03 is: 133,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,590.95 : 386,421.60 = 89,066.03 : x
  2. Step 2: Convert to fraction form
    257,590.95/386,421.60 = 89,066.03/x
  3. Step 3: Cross multiply
    257,590.95x = 386,421.60 × 89,066.03
  4. Step 4: Simplify right side
    257,590.95x = 34,417,035,886.14
  5. Step 5: Solve for x
    x = 34,417,035,886.14/257,590.95
  6. Step 6: Final answer
    x = 133,611.20

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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.