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Finding the Fourth Proportional to 84,904.60, 127,356.90 and 77,031.40

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Solution

The fourth proportional to 84,904.60, 127,356.90 and 77,031.40 is: 115,547.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,904.60 : 127,356.90 = 77,031.40 : x
  2. Step 2: Convert to fraction form
    84,904.60/127,356.90 = 77,031.40/x
  3. Step 3: Cross multiply
    84,904.60x = 127,356.90 × 77,031.40
  4. Step 4: Simplify right side
    84,904.60x = 9,810,480,306.66
  5. Step 5: Solve for x
    x = 9,810,480,306.66/84,904.60
  6. Step 6: Final answer
    x = 115,547.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.