Home / 128,013.02-176,689.59-77,754.14

Finding the Fourth Proportional to 128,013.02, 176,689.59 and 77,754.14

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Solution

The fourth proportional to 128,013.02, 176,689.59 and 77,754.14 is: 107,319.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,013.02 : 176,689.59 = 77,754.14 : x
  2. Step 2: Convert to fraction form
    128,013.02/176,689.59 = 77,754.14/x
  3. Step 3: Cross multiply
    128,013.02x = 176,689.59 × 77,754.14
  4. Step 4: Simplify right side
    128,013.02x = 13,738,347,117.40
  5. Step 5: Solve for x
    x = 13,738,347,117.40/128,013.02
  6. Step 6: Final answer
    x = 107,319.92

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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.