Home / 110,113.10-151,980.28-72,390.86

Finding the Fourth Proportional to 110,113.10, 151,980.28 and 72,390.86

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Solution

The fourth proportional to 110,113.10, 151,980.28 and 72,390.86 is: 99,915.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,113.10 : 151,980.28 = 72,390.86 : x
  2. Step 2: Convert to fraction form
    110,113.10/151,980.28 = 72,390.86/x
  3. Step 3: Cross multiply
    110,113.10x = 151,980.28 × 72,390.86
  4. Step 4: Simplify right side
    110,113.10x = 11,001,983,172.24
  5. Step 5: Solve for x
    x = 11,001,983,172.24/110,113.10
  6. Step 6: Final answer
    x = 99,915.30

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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.