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Finding the Fourth Proportional to 86,729.50, 119,686.87 and 46,985.50

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Solution

The fourth proportional to 86,729.50, 119,686.87 and 46,985.50 is: 64,840.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,729.50 : 119,686.87 = 46,985.50 : x
  2. Step 2: Convert to fraction form
    86,729.50/119,686.87 = 46,985.50/x
  3. Step 3: Cross multiply
    86,729.50x = 119,686.87 × 46,985.50
  4. Step 4: Simplify right side
    86,729.50x = 5,623,547,430.39
  5. Step 5: Solve for x
    x = 5,623,547,430.39/86,729.50
  6. Step 6: Final answer
    x = 64,840.08

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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.