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Finding the Fourth Proportional to 145,856.10, 218,456.10 and 86,807.10

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Solution

The fourth proportional to 145,856.10, 218,456.10 and 86,807.10 is: 130,015.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,856.10 : 218,456.10 = 86,807.10 : x
  2. Step 2: Convert to fraction form
    145,856.10/218,456.10 = 86,807.10/x
  3. Step 3: Cross multiply
    145,856.10x = 218,456.10 × 86,807.10
  4. Step 4: Simplify right side
    145,856.10x = 18,963,540,518.31
  5. Step 5: Solve for x
    x = 18,963,540,518.31/145,856.10
  6. Step 6: Final answer
    x = 130,015.41

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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.