Home / 142,038.77-196,013.28-78,376.52

Finding the Fourth Proportional to 142,038.77, 196,013.28 and 78,376.52

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Solution

The fourth proportional to 142,038.77, 196,013.28 and 78,376.52 is: 108,159.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,038.77 : 196,013.28 = 78,376.52 : x
  2. Step 2: Convert to fraction form
    142,038.77/196,013.28 = 78,376.52/x
  3. Step 3: Cross multiply
    142,038.77x = 196,013.28 × 78,376.52
  4. Step 4: Simplify right side
    142,038.77x = 15,362,838,760.19
  5. Step 5: Solve for x
    x = 15,362,838,760.19/142,038.77
  6. Step 6: Final answer
    x = 108,159.47

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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.