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Finding the Fourth Proportional to 164,015.80, 245,870.10 and 128,457.40

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Solution

The fourth proportional to 164,015.80, 245,870.10 and 128,457.40 is: 192,565.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,015.80 : 245,870.10 = 128,457.40 : x
  2. Step 2: Convert to fraction form
    164,015.80/245,870.10 = 128,457.40/x
  3. Step 3: Cross multiply
    164,015.80x = 245,870.10 × 128,457.40
  4. Step 4: Simplify right side
    164,015.80x = 31,583,833,783.74
  5. Step 5: Solve for x
    x = 31,583,833,783.74/164,015.80
  6. Step 6: Final answer
    x = 192,565.80

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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.