Home / 142,128.40-213,192.60-118,973.20

Finding the Fourth Proportional to 142,128.40, 213,192.60 and 118,973.20

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Solution

The fourth proportional to 142,128.40, 213,192.60 and 118,973.20 is: 178,459.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,128.40 : 213,192.60 = 118,973.20 : x
  2. Step 2: Convert to fraction form
    142,128.40/213,192.60 = 118,973.20/x
  3. Step 3: Cross multiply
    142,128.40x = 213,192.60 × 118,973.20
  4. Step 4: Simplify right side
    142,128.40x = 25,364,205,838.32
  5. Step 5: Solve for x
    x = 25,364,205,838.32/142,128.40
  6. Step 6: Final answer
    x = 178,459.80

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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.