Home / 145,828.32-201,242.96-78,760.32

Finding the Fourth Proportional to 145,828.32, 201,242.96 and 78,760.32

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Solution

The fourth proportional to 145,828.32, 201,242.96 and 78,760.32 is: 108,689.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,828.32 : 201,242.96 = 78,760.32 : x
  2. Step 2: Convert to fraction form
    145,828.32/201,242.96 = 78,760.32/x
  3. Step 3: Cross multiply
    145,828.32x = 201,242.96 × 78,760.32
  4. Step 4: Simplify right side
    145,828.32x = 15,849,959,927.35
  5. Step 5: Solve for x
    x = 15,849,959,927.35/145,828.32
  6. Step 6: Final answer
    x = 108,689.18

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1.5x scale

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.