Home / 211,012,075.28-316,428,429.52-86,428,814.72

Finding the Fourth Proportional to 211,012,075.28, 316,428,429.52 and 86,428,814.72

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Solution

The fourth proportional to 211,012,075.28, 316,428,429.52 and 86,428,814.72 is: 129,606,488.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,012,075.28 : 316,428,429.52 = 86,428,814.72 : x
  2. Step 2: Convert to fraction form
    211,012,075.28/316,428,429.52 = 86,428,814.72/x
  3. Step 3: Cross multiply
    211,012,075.28x = 316,428,429.52 × 86,428,814.72
  4. Step 4: Simplify right side
    211,012,075.28x = 27,348,534,107,124,656
  5. Step 5: Solve for x
    x = 27,348,534,107,124,656/211,012,075.28
  6. Step 6: Final answer
    x = 129,606,488.50

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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.