Home / 84,970.42-128,031.17-70,503.40

Finding the Fourth Proportional to 84,970.42, 128,031.17 and 70,503.40

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Solution

The fourth proportional to 84,970.42, 128,031.17 and 70,503.40 is: 106,232.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,970.42 : 128,031.17 = 70,503.40 : x
  2. Step 2: Convert to fraction form
    84,970.42/128,031.17 = 70,503.40/x
  3. Step 3: Cross multiply
    84,970.42x = 128,031.17 × 70,503.40
  4. Step 4: Simplify right side
    84,970.42x = 9,026,632,790.98
  5. Step 5: Solve for x
    x = 9,026,632,790.98/84,970.42
  6. Step 6: Final answer
    x = 106,232.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.