Home / 138,154,659.77-190,670,148.61-78,630,428.36

Finding the Fourth Proportional to 138,154,659.77, 190,670,148.61 and 78,630,428.36

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Solution

The fourth proportional to 138,154,659.77, 190,670,148.61 and 78,630,428.36 is: 108,519,506.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154,659.77 : 190,670,148.61 = 78,630,428.36 : x
  2. Step 2: Convert to fraction form
    138,154,659.77/190,670,148.61 = 78,630,428.36/x
  3. Step 3: Cross multiply
    138,154,659.77x = 190,670,148.61 × 78,630,428.36
  4. Step 4: Simplify right side
    138,154,659.77x = 14,992,475,460,472,582
  5. Step 5: Solve for x
    x = 14,992,475,460,472,582/138,154,659.77
  6. Step 6: Final answer
    x = 108,519,506.23

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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.