Home / 128,938.30-177,925.93-71,573.11

Finding the Fourth Proportional to 128,938.30, 177,925.93 and 71,573.11

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Solution

The fourth proportional to 128,938.30, 177,925.93 and 71,573.11 is: 98,765.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,938.30 : 177,925.93 = 71,573.11 : x
  2. Step 2: Convert to fraction form
    128,938.30/177,925.93 = 71,573.11/x
  3. Step 3: Cross multiply
    128,938.30x = 177,925.93 × 71,573.11
  4. Step 4: Simplify right side
    128,938.30x = 12,734,712,159.74
  5. Step 5: Solve for x
    x = 12,734,712,159.74/128,938.30
  6. Step 6: Final answer
    x = 98,765.94

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1.5x scale

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.