Home / 76,152.47-105,145.85-61,127.78

Finding the Fourth Proportional to 76,152.47, 105,145.85 and 61,127.78

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Solution

The fourth proportional to 76,152.47, 105,145.85 and 61,127.78 is: 84,400.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,152.47 : 105,145.85 = 61,127.78 : x
  2. Step 2: Convert to fraction form
    76,152.47/105,145.85 = 61,127.78/x
  3. Step 3: Cross multiply
    76,152.47x = 105,145.85 × 61,127.78
  4. Step 4: Simplify right side
    76,152.47x = 6,427,332,386.71
  5. Step 5: Solve for x
    x = 6,427,332,386.71/76,152.47
  6. Step 6: Final answer
    x = 84,400.84

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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.