Home / 191,124.65-286,721.40-78,743.42

Finding the Fourth Proportional to 191,124.65, 286,721.40 and 78,743.42

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Solution

The fourth proportional to 191,124.65, 286,721.40 and 78,743.42 is: 118,129.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,124.65 : 286,721.40 = 78,743.42 : x
  2. Step 2: Convert to fraction form
    191,124.65/286,721.40 = 78,743.42/x
  3. Step 3: Cross multiply
    191,124.65x = 286,721.40 × 78,743.42
  4. Step 4: Simplify right side
    191,124.65x = 22,577,423,623.19
  5. Step 5: Solve for x
    x = 22,577,423,623.19/191,124.65
  6. Step 6: Final answer
    x = 118,129.31

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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.