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Finding the Fourth Proportional to 72,486, 100,030.86 and 42,292.08

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Solution

The fourth proportional to 72,486, 100,030.86 and 42,292.08 is: 58,363.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486 : 100,030.86 = 42,292.08 : x
  2. Step 2: Convert to fraction form
    72,486/100,030.86 = 42,292.08/x
  3. Step 3: Cross multiply
    72,486x = 100,030.86 × 42,292.08
  4. Step 4: Simplify right side
    72,486x = 4,230,513,133.59
  5. Step 5: Solve for x
    x = 4,230,513,133.59/72,486
  6. Step 6: Final answer
    x = 58,363.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.