Home / 145,971.20-201,440.16-78,903.20

Finding the Fourth Proportional to 145,971.20, 201,440.16 and 78,903.20

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Solution

The fourth proportional to 145,971.20, 201,440.16 and 78,903.20 is: 108,886.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,971.20 : 201,440.16 = 78,903.20 : x
  2. Step 2: Convert to fraction form
    145,971.20/201,440.16 = 78,903.20/x
  3. Step 3: Cross multiply
    145,971.20x = 201,440.16 × 78,903.20
  4. Step 4: Simplify right side
    145,971.20x = 15,894,272,225.31
  5. Step 5: Solve for x
    x = 15,894,272,225.31/145,971.20
  6. Step 6: Final answer
    x = 108,886.36

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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.