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Finding the Fourth Proportional to 538,851.06, 808,210.98 and 139,458.69

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Solution

The fourth proportional to 538,851.06, 808,210.98 and 139,458.69 is: 209,171.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,851.06 : 808,210.98 = 139,458.69 : x
  2. Step 2: Convert to fraction form
    538,851.06/808,210.98 = 139,458.69/x
  3. Step 3: Cross multiply
    538,851.06x = 808,210.98 × 139,458.69
  4. Step 4: Simplify right side
    538,851.06x = 112,712,044,514.42
  5. Step 5: Solve for x
    x = 112,712,044,514.42/538,851.06
  6. Step 6: Final answer
    x = 209,171.05

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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.