Home / 138,461.79-191,088.50-78,036.52

Finding the Fourth Proportional to 138,461.79, 191,088.50 and 78,036.52

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Solution

The fourth proportional to 138,461.79, 191,088.50 and 78,036.52 is: 107,696.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,461.79 : 191,088.50 = 78,036.52 : x
  2. Step 2: Convert to fraction form
    138,461.79/191,088.50 = 78,036.52/x
  3. Step 3: Cross multiply
    138,461.79x = 191,088.50 × 78,036.52
  4. Step 4: Simplify right side
    138,461.79x = 14,911,881,552.02
  5. Step 5: Solve for x
    x = 14,911,881,552.02/138,461.79
  6. Step 6: Final answer
    x = 107,696.73

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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.