Home / 138,613.02-191,285.04-78,184.17

Finding the Fourth Proportional to 138,613.02, 191,285.04 and 78,184.17

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Solution

The fourth proportional to 138,613.02, 191,285.04 and 78,184.17 is: 107,893.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,613.02 : 191,285.04 = 78,184.17 : x
  2. Step 2: Convert to fraction form
    138,613.02/191,285.04 = 78,184.17/x
  3. Step 3: Cross multiply
    138,613.02x = 191,285.04 × 78,184.17
  4. Step 4: Simplify right side
    138,613.02x = 14,955,462,085.82
  5. Step 5: Solve for x
    x = 14,955,462,085.82/138,613.02
  6. Step 6: Final answer
    x = 107,893.63

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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.