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Finding the Fourth Proportional to 72,355.68, 99,823.68 and 42,547.68

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Solution

The fourth proportional to 72,355.68, 99,823.68 and 42,547.68 is: 58,699.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,355.68 : 99,823.68 = 42,547.68 : x
  2. Step 2: Convert to fraction form
    72,355.68/99,823.68 = 42,547.68/x
  3. Step 3: Cross multiply
    72,355.68x = 99,823.68 × 42,547.68
  4. Step 4: Simplify right side
    72,355.68x = 4,247,265,993.06
  5. Step 5: Solve for x
    x = 4,247,265,993.06/72,355.68
  6. Step 6: Final answer
    x = 58,699.83

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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.