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Finding the Fourth Proportional to 85,218.59, 127,641.98 and 70,259.51

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Solution

The fourth proportional to 85,218.59, 127,641.98 and 70,259.51 is: 105,235.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,218.59 : 127,641.98 = 70,259.51 : x
  2. Step 2: Convert to fraction form
    85,218.59/127,641.98 = 70,259.51/x
  3. Step 3: Cross multiply
    85,218.59x = 127,641.98 × 70,259.51
  4. Step 4: Simplify right side
    85,218.59x = 8,968,062,970.23
  5. Step 5: Solve for x
    x = 8,968,062,970.23/85,218.59
  6. Step 6: Final answer
    x = 105,235.99

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1.5x scale

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.