Home / 191,136.48-286,588.08-78,781.92

Finding the Fourth Proportional to 191,136.48, 286,588.08 and 78,781.92

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Solution

The fourth proportional to 191,136.48, 286,588.08 and 78,781.92 is: 118,124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,136.48 : 286,588.08 = 78,781.92 : x
  2. Step 2: Convert to fraction form
    191,136.48/286,588.08 = 78,781.92/x
  3. Step 3: Cross multiply
    191,136.48x = 286,588.08 × 78,781.92
  4. Step 4: Simplify right side
    191,136.48x = 22,577,959,191.51
  5. Step 5: Solve for x
    x = 22,577,959,191.51/191,136.48
  6. Step 6: Final answer
    x = 118,124.80

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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.