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Finding the Fourth Proportional to 539,019.70, 808,531.95 and 139,632.10

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Solution

The fourth proportional to 539,019.70, 808,531.95 and 139,632.10 is: 209,448.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,019.70 : 808,531.95 = 139,632.10 : x
  2. Step 2: Convert to fraction form
    539,019.70/808,531.95 = 139,632.10/x
  3. Step 3: Cross multiply
    539,019.70x = 808,531.95 × 139,632.10
  4. Step 4: Simplify right side
    539,019.70x = 112,897,014,095.60
  5. Step 5: Solve for x
    x = 112,897,014,095.60/539,019.70
  6. Step 6: Final answer
    x = 209,448.77

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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.